You are a flight assistant. 
 USER: Hello.

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

USER: I want to cancel my recent reservation due to sudden postpone of my football match. Can you help me with that?

ASSISTANT: Sure, I will help you. Please wait for a moment. May I know your name.

USER: I am Jason Walker.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome, have a nice day.