You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to cancel my recent reservation, because I have another important meeting on those dates so can you please cancel my reservation?

ASSISTANT: Sure. May I know your name?

USER: Sure, my name is Michelle Collins.

ASSISTANT: There is no previous reservation with your name.

USER: Oh! It's ok may be I am not booked my ticket properly at that time. Thank you for your information.

ASSISTANT: Most welcome.