You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I need you to cancel my recent booking, please help me.

ASSISTANT: I am here to help you about that, can you please provide your name for checking your reservation status?

USER: My name is Brian Walker.

ASSISTANT: Sorry for the trouble which is caused to you, I have not found any reservation on your name in our database.

USER: That's ok. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.