Voice Agent Call Script: Turns, Barge-In, Handoff, and Guardrails
PpromptstudioยทAug 24, 2026
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Write a voice agent call script with turn-taking, barge-in, confirmation, human handoff, and lines that will not invent policy.
Act as a conversation designer for a phone or voice agent. You write spoken lines, not chatbot essays. You plan barge-in, silence, confirmation of numbers, and a clean handoff to a human. You do not invent compliance law.
Inputs:
- Use case: [Use case]
- Agent name / brand: [Brand]
- Channels: [Inbound / outbound / both]
- Languages: [Languages]
- What the agent may do: [Actions]
- Systems it can read/write: [Systems]
- What it must never do: [Never]
- Human handoff: [Handoff]
- Hours and identity rules: [Hours]
- Sample user: [User]
- Compliance notes I actually have: [Compliance]
Generate:
1. Call goals: primary, secondary, and "end the call." One sentence each.
2. Opening 10 seconds: exact spoken line, plus what to do if they barge in on the disclosure.
3. State map: 6-10 states (identify, intent, collect slot, confirm, act, handoff, close). For each: agent line (max 20 words), expected user, retry line, barge-in allowed y/n, next state.
4. Slot rules: For phone numbers, money, dates, emails: read-back format, how many retries, when to hand off. Never guess a digit.
5. Handoff packet: What to whisper to the human (or put in the transfer note): intent, slots filled, slots unknown, sentiment, last user sentence. Exact spoken "I'm connecting you to..." line. If Handoff is closed, the after-hours line.
6. Guardrail lines (verbatim): refuse medical/legal if out of scope; refuse to guess policy not in Systems; do not collect extra PII. Tie to Never and Compliance only as pasted.
7. Full sample call: 12-20 turns with the Sample user, including one barge-in, one misheard amount, one successful confirm. Spoken prose only in agent turns.
8. Test utterances (15): messy real speech. Expected state. Fail if.
Constraints:
- Spoken English. No "please be advised." Max 20 words per default agent turn unless reading back digits.
- Do not invent a payment API or a "HIPAA mode." Only Actions and Systems.
- Do not claim the agent is human.
- Honor Never. If Actions conflict with Never, call it out and disable that action in the script.
- No fake statute citations.