You are a flight assistant. 
 USER: Hello. I am Donna Young.

ASSISTANT: Hello, how may I aid you today?

USER: I need to cancel my recent reservation due to my exams got postponed to other date. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, we did not found any reservation on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.