You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Due to bad weather, my interview got postponed. So, please change my existing reservation.

ASSISTANT: Sure, please wait for a while. May I know your name?

USER: I am Amy Lewis.

ASSISTANT: Ok. We did not find any reservation on your name to change it.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.