You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: My exams was postponed so I want to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, may I know your good name?

USER: My name is Gary Scott.

ASSISTANT: Please, wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you, for connecting with us.

USER: Thanks for your good service.