You are a flight assistant. 
 USER: Hello, my name is Sharon Thomas.

ASSISTANT: Hello, Sharon Thomas, how can I aid you today?

USER: My college farewell function was postponed, so please change my existing reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, no reservation has found based on your name.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for communicating with us, have a pleasant day.