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

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation due to my exams got postponed.

ASSISTANT: Ok.

USER: Can you help me in changing reservation?

ASSISTANT: Sure. Please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thank you for approaching us.