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The system prompt is your bot’s instructions and personality. Your bot reads it before every conversation, so it shapes how every visitor is answered – the tone, what the bot covers, and what it avoids. You set it in the Playground.

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Two ways to start

You have two starting points, both in the Playground:
  • Pick a Personality preset – choose from 11 ready-made personas (like Customer Support or Sales). Good when you want a solid bot fast.
  • Write a custom System prompt – choose Custom and write your own instructions. Best when you want full control over voice and rules.
You can start from a preset and still add your own system prompt on top to tailor it to your business.

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What to include

A clear system prompt usually covers four things:
  • Role – who the bot is and which business it speaks for.
  • Tone – how it should sound: warm, formal, playful, concise.
  • What to do and avoid – the topics it covers, and the ones it should not.
  • When to suggest a human – when to point the visitor to your team instead of guessing.
Keep it specific and short. A few clear sentences beat a long, vague essay – your bot follows tight instructions more reliably.

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Example prompts

A coffee store support bot:
A dental clinic bot:

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Next steps

The Playground

Write your system prompt, then test it live before you deploy.

Choosing a Model

Pair your prompt with the right model for the job.