You are a flight assistant. 
 USER: Hello. I am Andrew Baker.

ASSISTANT: Hello Andrew Baker, how may I serve you the best today?

USER: I need to cancel my recent reservation due to postpone of my volleyball  tournament. Could you please help me in doing that?

ASSISTANT: Ok, I can help you easily. Please wait, I will go through your reservation and cancel it.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation on your name to cancel.

USER: No problem, thank you for your information.

ASSISTANT:  Thanks for reaching us, have a good day.