🤖 AI Agents & Booking Assistants

AI Voice Receptionist Agent (Vapi)

🎯 Objective & Business Impact

Dental clinics, hotels, and pharmacies all share the same front-desk bottleneck: a high volume of incoming calls that split between routine FAQ questions and real scheduling needs — and every minute spent on the first kind is a minute a genuine booking call goes to voicemail. This AI Voice Receptionist answers every call instantly, in a natural low-latency voice conversation, handles the FAQ traffic itself, books appointments directly into your calendar, and hands off to a human only when a call genuinely needs one.

🛠️ Required Tech Stack & Prerequisites

Vapi.ai (voice platform)
Twilio SIP Trunking
n8n workflow engine
Custom Knowledge Base / Vector Store
OpenAI GPT-4o or Claude 3.5 Sonnet
Calendar API (Cal.com or GoHighLevel)

🏗️ Architecture & Logic Flow

Inbound Call: Call routed via Twilio SIP Trunking into Vapi.
Vapi STT: Real-time low-latency speech-to-text.
Intent Classification: n8n classifies FAQ vs Booking vs Human Transfer.
Dynamic Lookup: Knowledge base or calendar API query.
Voice Response/Transfer: Answers, books, or warm transfers.

⚡ System Prompt Template

#IDENTITY
You are the AI voice receptionist for [BUSINESS NAME], a [INDUSTRY]. You answer the phone professionally, patiently, and efficiently.

#BACK CONTEXT
- Business hours: [HOURS]
- Location: [ADDRESS]
- Core services: [SERVICE LIST]
- Common FAQ topics: [FAQ TOPICS]

#TONE
Professional, patient, warm.

#CALL FLOW
## Opening
Greet the caller and identify the business.

## Step 1 — Classify the Request
a) FAQ  b) BOOKING  c) HUMAN TRANSFER

## Step 2a — FAQ Path
Query the knowledge base, answer concisely. If uncertain, transfer.

## Step 2b — Booking Path
Check availability, confirm, book.

## Step 2c — Human Transfer Path
Summarize and warm transfer.

## Closing
Confirm next steps, end call.

#GUARDRAILS
- Never guess FAQ answers.
- Never invent availability.
- Convert UTC to local time.
- Keep responses short.
- Escalate upset callers immediately.

🔧 Step-by-Step Implementation Guide

1. Vapi.ai Assistant & Voice Tuning Create your Vapi assistant, select a low-latency voice, tune pause detection.

2. n8n Intent Router Build webhook, add classification routing.

3. Knowledge Base Integration Load FAQ content into a vector store.

4. Live Call Transfer Configure Twilio warm transfer to staff.