Automated property & restaurant bookings with AI voice calls via Telegram
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 21 nodes and runs on Telegram events (message) (plus 1 other trigger). Along the way it connects Google Gemini Chat Model, Telegram and Google Calendar. It also calls api.retellai.com over HTTP.
How it runs
Trigger: On Telegram events (message) (plus 1 other trigger).
- Send a text message (Telegram): uses Telegram
- Filter: keeps only the items that match a condition
- Switch: routes items into 2 branches
- AI Agent: runs an AI agent, with model: Gemini 2.0 Flash; 1 tool (Create an event in Google Calendar)
- AI Agent: runs an AI agent, with model: Gemini 2.0 Flash; 1 tool (Get an event in Google Calendar); output parser: Structured Output Parser
- AI Agent: runs an AI agent, with model: Gemini 2.0 Flash; 1 tool (Get an event in Google Calendar); output parser: Structured Output Parser
- Notify Success (Telegram): uses Telegram
- Retell Create Call (HTTP Request): calls api.retellai.com (POST)
- Retell Create Call (HTTP Request): calls api.retellai.com (POST)
Services it uses
HTTP calls to: api.retellai.com
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 AI Agent Parse Call (v1.7), AI Agent Reserva Restaurantes (v1.7), AI Agent: Property Viewings (v1.7): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) AI Agent Parse Call (v1.7), AI Agent Reserva Restaurantes (v1.7), AI Agent: Property Viewings (v1.7) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (10)
- Google Gemini Chat Model
@n8n/n8n-nodes-langchain.lmChatGoogleGemini - HTTP Request
n8n-nodes-base.httpRequest - Webhook
n8n-nodes-base.webhook - AI Agent
@n8n/n8n-nodes-langchain.agent - Telegram
n8n-nodes-base.telegram - Google Calendar Tool
n8n-nodes-base.googleCalendarTool - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Filter
n8n-nodes-base.filter - Telegram Trigger
n8n-nodes-base.telegramTrigger - Switch
n8n-nodes-base.switch
From the author
This automation template is an AI-powered booking agent that schedules property viewings and reserves restaurant tables for you, all coordinated through Telegram. It checks your calendar to avoid conflicts, places the calls on your behalf, negotiates times,…