AI Voice Agent System Prompt & Webhook Function Calling Protocol
Write low-latency system prompts and function calling definitions for conversational AI phone agents (Vapi, Retell, Bland, Twilio).
System Directive • Copy and Paste Below
Act as a conversational AI telephony architect specializing in sub-second low-latency voice agents (Vapi, Retell AI, Bland AI, Twilio WebRTC). Write a production-grade system prompt, conversational state machine, and function calling specification for an inbound telephone assistant. ### VOICE AGENT PARAMETERS: - Company & Business Niche: [COMPANY_NAME_AND_NICHE] - Agent Persona Name & Tone: [AGENT_PERSONA_NAME_AND_TONE] - Primary Phone Call Objectives: [PRIMARY_CALL_OBJECTIVES_E_G_BOOK_APPOINTMENT_TRIAGE] - Integrated Tools / Functions (e.g. check availability, book slot, look up client): [TOOLS_AVAILABLE] - Transfer / Human Escalation Protocol: [HUMAN_ESCALATION_CONDITIONS] ### COMPLETE VOICE SPECIFICATION: 1. **Core Voice System Prompt**: - Specialized rules for spoken voice (short sentences under 25 words, natural fillers, avoiding bullet points or markdown). - Pronunciation guides for acronyms, numbers, and dates. - Persona boundaries and tone calibration. 2. **Conversational State Machine (Turn-by-Turn)**: - Greeting & Initial Inquiry - Information Gathering (Name, phone, service needed) - Function Execution (Checking calendar) - Confirmation & Booking - Natural Sign-off. 3. **Function Calling JSON Tool Definitions**: - Tool 1: `check_availability(date, time_range)` - Tool 2: `create_booking(customer_name, phone, slot_timestamp, service_id)` - Complete OpenAPI / JSON schema parameters for both. 4. **Interruption & Background Noise Handling**: - How the agent handles user interruptions, background barking/babies, or long pauses without losing context. 5. **Human Warm-Transfer Protocol**: - Exact spoken phrase before triggering a SIP referral transfer to human staff.
Customization & Placeholders
Keep spoken sentences short. Voice AI prompts require conversational pacing cues and strict function schemas.
Example Input Values
Company: Premier Dental Clinic, Persona: 'Sarah', warm and reassuring, Objectives: Triage dental emergency vs routine cleaning, check schedule, book appointment, Tools: Google Calendar API.
Expected Output Structure
Full spoken system prompt, conversational branching logic, OpenAPI function definitions for calendar booking, and SIP transfer script.
Enterprise AI Voice Systems — Qubenix Vox
Qubenix Vox delivers sub-second conversational telephone agents with natural accents, deep CRM integration, and 24/7 availability.
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