Multi-channel AI appointment confirmation with GPT-4, ElevenLabs & Twilio
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 18 nodes and runs when an HTTP GET request hits its webhook URL. Along the way it connects Postgres, Twilio, Gmail and Google Calendar and 1 more.
How it runs
Trigger: When an HTTP GET request hits its webhook URL.
- Parameter Extaction (Code): runs custom JavaScript code
- Postgres: uses Postgres
- Send to Cristiano (Gmail): uses Gmail
- Voice Message Crafter (AI Agent): runs an AI agent, with model: OpenAI Chat Model
- Create Calendar Event (Google Calendar): uses Google Calendar
- Send to Client (Gmail): uses Gmail
- AI Agent: runs an AI agent, with model: OpenAI Chat Model; output parser: Structured Output Parser
- Merge: merges the data from its input branches
- Respond to Webhook: sends the response back to the webhook caller
- Escape (Code): runs custom JavaScript code
…plus 4 more steps. See the full node list below.
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in Voice Message Crafter (v1.8), AI Agent (v1.8): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) Voice Message Crafter (v1.8), AI Agent (v1.8) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (12)
- Respond to Webhook
n8n-nodes-base.respondToWebhook - Postgres
n8n-nodes-base.postgres - Code
n8n-nodes-base.code - Twilio
n8n-nodes-base.twilio - Gmail
n8n-nodes-base.gmail - Google Calendar
n8n-nodes-base.googleCalendar - HTTP Request
n8n-nodes-base.httpRequest - AI Agent
@n8n/n8n-nodes-langchain.agent - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Webhook
n8n-nodes-base.webhook - Merge
n8n-nodes-base.merge - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured
From the author
📆 Workflow: AI Appointment Booking Assistant ⚡ About the Creators This workflow was created by Varritech Technologies, a cutting-edge software agency that helps founders and operators go from idea to production 5× faster using AI. Based in New York City, we…