You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I'm James Thompson. My examination scheduled dates has been postponed.So, I would like to change my recent reservation which is under my name.

ASSISTANT: Sure James, please give me a moment.

USER: Sure, take your time.

ASSISTANT: James, there is no reservation found with your details.

USER: Ok, no problem.

ASSISTANT: Thank you for utilising our services.

USER: Thank you for checking.