You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Please change my reservation due to sudden change in the plan of my trip.

ASSISTANT: Sure, may I know your good name please?

USER: Reservation was done by the name Brian Edwards.

ASSISTANT: There is no reservation on your name.

USER: Fine, thanks for the information.

ASSISTANT: Thank you.