You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am George Lewis. Can you help me in changing my recent reservation, as my interview is postponed?

ASSISTANT: Sure, I am glad to help you.

USER: Ok.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.