# Change Character Prompt

You are able to alter the behavior, knowledge, and goal of your AI Chat agent during the course of your simulation with this action. This will allow your agent to easily perform multiple roles in the middle of your simulation by simply adjusting what prompt the agent is using to what is necessary at the time. Within the text field, type into the prompt what you would like the AI Chat agent to use.

Please take note that this is overwriting what the previous prompt was in the agents memory. They will still have access to the entire conversation up to this point unless you also use the [reset-chat](https://docs.siminsights.com/authoring-a-simulation/state-machine/actions/reset-chat "mention")action.

For further details on your initial character prompt, see [ai-chat](https://docs.siminsights.com/ai/ai-chat "mention")