You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to cancel my recent reservation because of my exams were postponed. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: Myself Eric Green.

ASSISTANT: Please, wait a moment. Sorry, no reservation found.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for checking.

ASSISTANT: Welcome.