// Case Study
An n8n-powered AI voice receptionist handles the full appointment lifecycle - inbound calls, Cal.com booking, returning-caller recognition, rescheduling, and cancellations - all through natural voice conversation with no human involvement.
The problem
Businesses that rely on phone calls miss most calls outside business hours, and manual scheduling produces double-booking errors.
No-show rates climb without automated confirmation and reminders, so every off-hours caller is a booking left on the table.
Five independent n8n webhook endpoints tied to a Retell AI voice agent cover the complete appointment lifecycle from a single natural conversation.
Lead capture from inbound calls flows straight into booking confirmation via the Cal.com API, so callers book without waiting for a human.
Returning-visitor recognition pulls booking-history context, and rescheduling and cancellations are handled in-call through voice.
n8n logs post-booking data to Google Sheets and sends confirmation emails with meeting links via Gmail immediately after each call.
B2B / AI Services / US
A GPT-4o-mini LangChain agent qualifying B2B leads, handling objections, and booking meetings with Meet links.
Home Services / Australia
A production-ready inbound AI receptionist for a trades business - 24/7 call handling and qualification on a local AU number.
Healthcare / Optometry / UK
A 24/7 AI phone receptionist handling all inbound calls, bookings, and cancellations with no human involvement.
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