You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Michelle Harris here.

ASSISTANT: Sorry to inform you that, we did not find any reservation on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for approaching us.