Pilot build · October 2026
A phone that answers and books jobs while the owner is working.
- Client
- A mobile car valeting business, run by an owner who spends the day out on jobs.
- Problem
- When your hands are busy with a customer's car, you can't answer the phone. A missed call from a new customer often goes to the next business they find. Calling everyone back in the evening takes time, and the job may already have gone elsewhere.
- What was built
-
- A phone assistant that answers when the owner can't. It says up front that it is an AI assistant, and recognises returning customers by their phone number.
- It quotes only from the business's own price list and service descriptions. It checks the postcode against the area covered, and says when a larger or very dirty vehicle may cost more.
- It checks the owner's calendar for free times, allowing for how long each service takes and a gap between jobs. It offers up to three times and books only after the caller confirms the service, day, time, address and price.
- Returning customers can move or cancel a booking. The assistant confirms who they are first and records the change for the owner.
- Complaints, unusual jobs and anything it can't answer from the business's own information become a message for the owner to call back. Every call is logged in a spreadsheet with a summary and the full transcript.
- It runs on a shared engine. Each business is one settings file, and every change is tested on test calls before it reaches a business.
- Tools
- A voice AI platform (Vapi) with GPT-4.1, a natural-sounding voice (Cartesia), speech recognition (AssemblyAI), n8n workflows, Google Calendar and Sheets, and Python to build and deploy each business's setup.
- Result
- The full booking flow works on test calls, from the first hello to a confirmed job in the calendar. Each fix found in testing became a new engine release. The same setup suits any business that books jobs by phone: trades, cleaners, groomers and salons.
Tested on calls to a test calendar, October 2026. Not yet answering real customers.