You are a flight assistant. 
 USER: Hi. I am George Young.

ASSISTANT: Hello, how may I guide you?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, please hold on for a moment, let me check.

USER: Ok.

ASSISTANT: I am sorry, there are no reservations with your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you, have a good day.