You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Samuel Martin. Can you cancel my recent reservation which is done a week ago?

ASSISTANT: Sure. Wait for a minute please. I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, I will wait. Ok, need not to worry. Thank you for helping me.

ASSISTANT: Thank you.