You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I just want to cancel my recent reservation because my business trip postponed, can you help me for that?

ASSISTANT: Sure, may I know your name please?

USER: I am Rebecca Allen.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: It's ok.

ASSISTANT: Thank you.

USER: Thank you.