You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Glad to meet you Wilson.

USER: Thank you.

ASSISTANT: Ok, hold on for a while. Let me check.

USER: Sure, take your time.

ASSISTANT: Sorry Wilson, there are no flights reserved under your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: You are welcome.