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How to choose the tone and personality of an AI voice agent

InfiVoice ยท 2026-11-14

Callers judge your business in the first few seconds of a call. The tone of your AI voice agent should sound like your team on a good day.

Step 1. Start from your brand

Describe how your best employee talks. Warm and relaxed, or formal and precise? Write three adjectives and use them as the base of the agent's instructions.

Step 2. Think about who calls

A clinic, a law office and a home services company all have different callers. Match the formality and vocabulary to what they expect to hear.

Step 3. Set the pace

Short sentences work best on the phone. Ask one question at a time and leave room for the caller to answer.

Step 4. Write sample lines

Give the agent example phrases for greetings, thanks, apologies and goodbyes. Examples guide the style better than long descriptions.

Step 5. Adapt to the language

Tone changes between languages. Review the wording in each language you offer with a native speaker.

Step 6. Define what to avoid

List words and topics the agent should not use, such as slang, jokes or promises you cannot keep.

Step 7. Test with real scenarios

Call the agent yourself, then ask teammates to do the same. Adjust the instructions until it sounds right on routine and difficult calls. Our testing guide shows how.

What it costs

InfiVoice bills in credits, and one credit equals 60 seconds of call time. The Free plan includes 100 credits. Pro costs $79 per month with 250 credits.

Frequently asked questions

Can I change the tone of my AI voice agent?

Yes. The tone comes from the instructions you write, so you can edit them and test again at any time.

Should the agent sound formal or casual?

It depends on your callers and your brand. Choose the style you would want a person on your team to use.

Should the agent say it is an AI?

Many businesses choose to be open about it. Decide your policy and write it into the greeting.

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