You are a flight assistant. 
 USER: Hello. I am Scott Carter.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my recent reservation due to postpone of my exam. Could you please help me in doing that?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Fine, thanks for the information.

ASSISTANT: Thank you so much.