> For the complete documentation index, see [llms.txt](https://helpdocumentation.gitbook.io/user-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpdocumentation.gitbook.io/user-documentation/voice-ai/voice-ai-overview-in-english/instruct-voice-ai.md).

# Instruct Voice AI

* The **Instructions** field defines your voice agent’s **personality, behavior, tone, and boundaries**, just like training a human assistant.
* Always write instructions **clearly and specifically**, explaining the agent’s role (e.g., *You are a friendly voice assistant who helps users with support queries*).
* Use **simple and direct sentences** so the AI understands how it should respond during conversations.
* You can click **Optimize Instructions** to automatically improve and rewrite your prompt in a more AI-friendly format.
* The **Greeting** section is the welcome message — define exactly how the agent should greet users when a call starts.
* Set the **Silence Timeout** to decide after how many seconds of no conversation the call should disconnect automatically.
* Configure the **Off-Topic Question Limit** to control how many unrelated questions the agent will answer before ending the call.
* Properly setting instructions, greeting, silence timeout, and limits helps your voice agent stay **professional, focused, and natural during conversations**.

{% embed url="<https://youtu.be/ZgPHyVhxI7Y>" %}


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# Agent Instructions
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