AI Call Center
Voice AI system connected to a custom appointment backend for availability checks, bookings, rescheduling, cancellations, transfers and confirmations.
STATUS: Validated through development and test-call scenarios; not presented as live customer traffic.
Open VoicePls01. Overview
Voice AI system connected to a custom appointment backend for availability checks, bookings, rescheduling, cancellations, transfers and confirmations.
02. Interface / Screenshots

03. Architecture
Interactive Architecture Walkthrough — a visualization of the implemented architecture/workflow.
Interactive Architecture Walkthrough
A call workflow for booking, rescheduling, cancellation, transfer, and summaries through Vapi tool calls. [Based on development and test-call scenarios; not live customer traffic.]
04. Problem
Businesses need a reliable voice workflow to handle repetitive appointment requests without relying on a human to answer every call.
05. Solution
Connected Vapi to a custom booking backend, designed the prompt and tool-call flow, and validated appointment actions through backend logic.
AI focus
- -System prompt design for booking workflows
- -Tool and function calls for booking actions
- -Fallback logic and error handling for call interruptions
06. Key Features
- >Inbound calls
- >Outbound calls
- >Availability checking
- >Appointment booking
- >Rescheduling
- >Cancellation
- >Human transfer
- >SMS confirmation
- >Call recording
- >Transcripts and call summaries
07. Engineering Challenges
Added fallback prompts and validation before backend actions.
Separated LLM intent detection from backend execution steps.
08. Outcome
Connected conversational voice interactions to real booking actions through validated backend tool calls.