Trigger my bot if user message anything in the chatbox

Hi @Deepak_Kumar
If there is an intent that matches the user’s message, then yes we can trigger a specific flow.

You can check out how to set up intents here: Intents | yellow.ai

If the user types a random message that hasn’t been trained as an intent, the bot will trigger universal fallback. You can set the universal fallback to trigger a journey or display a text message.