AI SMS Agent(Follow-up Automation)
The AI SMS Agent operates inside GHL and manages all automated text conversations with leads and customers. It works alongside the Voice AI and Retell outbound calling system, providing a full communication loop across phone, voice, and text.
Platform
GoHighLevel (GHL) CRM
Purpose
Automated SMS Follow-up System
Integration
Voice AI + Retell + n8n
What the SMS Agent Handles
The SMS agent handles the entire lifecycle of follow-up messaging, including missed call replies, new lead qualification, nurture sequences, reminders, and post-call automation.
The AI SMS Agent Will:
Hold Conversations
Ask questions, answer questions, and guide leads
Qualify Leads
Collect qualification data and update CRM fields
Book Appointments
Guide leads toward calendar booking
Always-Active Follow-up
Run parallel to inbound voice AI and outbound Retell AI
Training Sources: Business profile, services, knowledge base, FAQ data, calendar availability, pipeline rules
Hi, sorry we missed your call. How can I help you?
Just nowI need pricing info for your services
Just nowGreat! What service are you most interested in? And what's your timeline?
Just nowMarketing package, need it this month
Just nowPerfect! Would you like to book a call? I have openings tomorrow at 10am or 2pm.
Just nowTrigger Points That Activate SMS Agent
Missed Calls
AI sends automated SMS within seconds: "Hi, sorry we missed your call. How can I help you?"
New Lead Entries
Form, landing page, manual import, or API – AI immediately sends welcome message and begins qualification
Outbound Call Follow-Up
After Retell AI calls: "No Answer" → follow-up text, "Callback Requested" → AI reaches out
Appointment Reminders
AI sends SMS reminders, confirmations, and handles rescheduling based on calendar triggers
Pipeline Stage Movements
Movement between pipeline stages automatically triggers the SMS agent's next conversation flow. This ensures leads receive contextual messages as they progress through your sales funnel.
Configuration of the AI SMS Agent
Inside GHL, activated under Conversation AI settings
Onboarding Configuration Includes:
The agent's personality and tone mirror the inbound voice receptionist unless the brand requires a different style.
Business Introduction: Company overview and value proposition
Greeting Tone: Message style and personality
Response Rules: Guidelines for AI replies
Qualification Questions: What to ask leads
Calendar Booking: Instructions for scheduling
Knowledge Base: Linked information sources
Hours Logic: Operating hours behavior
Note: The SMS agent automatically adapts its responses based on the knowledge base and company profile.
SMS Qualification Flow
How AI handles lead conversations step-by-step
1. Greeting
A personalized introduction acknowledging the context:
- Missed call acknowledgment
- New lead welcome
- Outbound call outcome follow-up
2. Initial Engagement
AI asks the lead:
- What they need
- If they are still interested
- If they need assistance
- If they want to book
3. Qualification
AI collects required business fields:
- Service needed
- Timeline & Urgency
- Location & Budget
- Decision-maker status
Details saved to custom fields in GHL
4. Appointment Booking
When the lead is ready:
- AI pulls available slots from GHL calendar
- Sends booking links
- Books appointment inside CRM
- Sends confirmation SMS
5. Lead Status Updates
The AI updates based on conversation:
- Pipeline stage
- Tags
- Custom fields
- Tasks & Contact notes
6. Conversation Memory
AI remembers context:
- What the lead asked
- Qualification details collected
- Previous conversation context
GHL Workflow Structure for SMS AI
Workflows built in GHL ensure AI responds at correct times
Missed Call SMS Workflow
Missed call
Enable AI SMS conversation
Send first AI-initiated greeting message
New Lead Follow-Up Workflow
Lead created
AI SMS intro message
Qualification question sequence
Retell Disposition Follow-Up Workflow
Outbound call status returned
Branch logic based on disposition
"No Answer": AI texts and asks for a better time
"Callback Requested": AI sends scheduling SMS
"Interested": AI confirms interest and asks questions
"Booked": AI sends confirmation message
Long-Term Drip Workflow
Lead unresponsive after X hours
AI sends periodic messages including:
- • Reminders
- • Value-driven messages
- • Re-engagement prompts
AI Texting Content Source
The AI uses the Knowledge Base to respond naturally
Knowledge Base Includes:
Web Crawler Pages
Website content pulled
FAQ Document
Common questions
Products/Services
Descriptions & details
Pricing Structure
Rates & packages
Policies
Terms & conditions
About Business
Company info
Unique Logic
Business-specific rules
Hours & Location
Operating details
Conversation Handling Logic
Layered conversation intelligence inside GHL
Memory Handling
The AI remembers:
- • What the lead asked
- • Qualification details already collected
- • Previous context from conversation
Error Recovery
If user replies with unclear input:
- • AI asks for clarification
- • AI rephrases questions
- • AI guides user step-by-step
Fallback
If AI is unable to answer:
A task is created for the client.
Integration With Inbound & Outbound Calls
SMS agent is part of the combined communication system
When Inbound AI Handles a Call
SMS agent follows up automatically if needed.
When Retell Makes Outbound Call
SMS agent sends the next message based on disposition.
When n8n Sends Status Updates
SMS agent responds according to triggers built in GHL.
This ensures no lead is ever unanswered.
Real-World Scenarios
How the AI SMS Agent handles common situations automatically
Scenario 1: Missed Call
Lead calls but no one answers
Caller rings but no one answers
SMS agent auto-sends a message
Lead replies with question
AI answers using knowledge base
AI books appointment
Scenario 2: Outbound Retell Call – No Answer
AI makes outbound call but lead doesn't pick up
Retell calls lead
Lead doesn't pick up
GHL receives "No Answer" disposition
"Sorry we missed each other. Can we try another time?"
Scenario 3: Lead Becomes Unresponsive
Lead stops replying after initial contact
AI sends follow-ups every X hours
AI sends value messages
Lead responds and booking is completed
Scenario 4: Lead Wants Pricing
Lead asks about pricing information
AI reads pricing FAQ from knowledge base
AI sends complete pricing text automatically
Scenario 5: Lead Cancels Appointment
Lead texts to cancel their scheduled appointment
AI detects cancellation via SMS
AI offers rescheduling options
AI books new time slot
Why This Matters
Every scenario is handled automatically without human intervention. The AI SMS Agent works 24/7, ensuring no lead falls through the cracks and every conversation moves toward conversion.
Developer Implementation Details
Developers ensure the following components are properly configured:
Workflow Triggers
Workflows fire correctly for missed calls, dispositions, new lead creation, and pipeline stage movement.
AI Enable Flags
Custom fields indicate whether AI should be: Active, Paused, or Handoff to human only.
Webhook Validation
Retell → GHL disposition data must be verified to trigger correct SMS workflows.
Calendar API
Calendar availability must be synced correctly to allow SMS AI to book appointments.
Knowledge Base Refresh
Important: KB must be re-crawled after website updates to ensure AI has the latest information.
Implementation Checklist
GHL Configuration
Conversation AI enabled and configured
AI personality and tone set to match brand
Knowledge base populated with business info
Qualification questions defined
Calendar booking instructions configured
Workflow Setup
Missed call SMS workflow active
New lead follow-up workflow active
Retell disposition workflow configured
Long-term drip workflow set up
Pipeline stage triggers tested
Integration Verification
Retell webhook data flowing to GHL
n8n status updates triggering correctly
Calendar API synced and accessible
Knowledge base web crawler completed
Testing Complete
Missed call scenario tested
New lead flow tested
Outbound disposition handling tested
Appointment booking flow tested
Fallback behavior verified
System Complete
The AI SMS Agent operates as an always-active follow-up system running parallel to inbound voice AI and outbound Retell AI. It uses GHL's Conversational AI texting engine to engage leads through natural language SMS conversations.