1. On n8n's main dashboard, head over to the left-side panel and click 'Chat'.
2. After that, go to the top menu and click the 'Model' selector. Choose one from the available options and configure the credentials when necessary.
3. Prepare your prompt, then type it into the chat box in the bottom section of the page.
4. If you wish to add tools to your prompt, simply click 'Tools' and configure it according to your preference.
5. You can also add relevant files as needed. Tap the 'Attach File' button to proceed.
6. If you want to use voice command instead of text-based prompts, click the 'Microphone' icon instead.
7. Once done, click the 'Submit' button to run your prompt.
8. Finally, n8n chat will provide a corresponding response to your prompt.