You are a flight assistant. 
 USER: Hello. I'm Angela Parker.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Give me a moment, let me check your details.

USER: Sure.

ASSISTANT: Sorry Angela, I didn't found any reservation basis on your details.

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

ASSISTANT: You are welcome.