You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning.

USER: Very good morning.

ASSISTANT: May I know your name please?

USER: Sure, my name is Christine Carter.

ASSISTANT: Carter, what kind of service you are looking from agency?

USER: My final exam dates are postponed.Can you please help me for  changing the existing reservation?

ASSISTANT: I can help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry Carter, there is no reservation found on your name in our records.

USER: No problem, I will search with another airline.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: You are most welcome.