AI Receptionist for an Auto Repair Shop
An n8n + GPT-4o voice and chat agent that handles appointment booking around the clock — so the shop captures clients in evenings and weekends without lifting a finger.
Problem
George runs a 6-bay auto repair shop in Austin. His front desk was open 9–6, Monday–Saturday. Any client who called after hours got voicemail — and most didn't leave a message. Weekend inquiries piled up and were handled Monday morning, by which point the client had already booked somewhere else.
The shop had no online booking. Appointments were managed in a paper diary, then moved to a shared Google Calendar by hand.
Solution
Built a two-channel AI receptionist:
- SMS + WhatsApp channel — n8n webhook receives inbound messages via Twilio. GPT-4o handles the conversation: greets the client, asks about the car make, issue type, and preferred time slot
- Availability check — n8n reads Google Calendar in real time to find open slots matching the client's preference
- Booking confirmation — Once a slot is agreed, n8n creates a Calendar event with all client details and sends a confirmation SMS
- Escalation logic — If the client asks about pricing on a complex job, the agent responds with a range and flags the conversation to George via Telegram for follow-up
- Reminders — 24h and 2h before the appointment, automated reminder SMS goes out. No-show rate dropped noticeably from day one
The agent handles English and Spanish (40% of George's clientele speaks Spanish as a first language).
Result
+10% monthly bookings in the first 30 days ROI in month one — the system cost less than one missed booking per week Zero missed after-hours inquiries
George's words: "It's like having a receptionist who never sleeps and never calls in sick."
What made it work
The key design choice was keeping the agent focused: it only books, confirms, and escalates. It doesn't try to diagnose car problems or quote complex jobs — that's the human's role. Clear scope = zero embarrassing failures.
Tone calibration mattered too. The first version was too formal and clients felt they were talking to a bot immediately. After tuning the system prompt with examples from George's own messages, the tone matched how the shop actually communicates.
Stack
- n8n (self-hosted) — orchestration and business logic
- GPT-4o — conversation handling
- Twilio — SMS and WhatsApp gateway
- Google Calendar API — real-time availability and booking
- Telegram Bot API — escalation alerts to the owner
Want similar results?
Let's find out if automation makes sense for your workflow.
Book a Discovery Call