You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Kevin Nelson.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: No problem, thank you for the checking.

ASSISTANT: Thank you.