You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: George Moore here.

ASSISTANT: I hope you are fine, how can I help you?

USER: My interview got postponed, so I want to change my reservation.

ASSISTANT: Ok, shall I help you in changing your reservation?

USER: Sure.

ASSISTANT: Moore, I did not find any reservation by your name in our database.

USER: No problem, thank you.

ASSISTANT: You are welcome and thank you for choosing us.