You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to change my reservation due to postpone of my sister's engagement. Please help me with it.

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

USER: Please search the reservation with the name Brandon Lee.

ASSISTANT: Thank you for providing your name, there is no reservation found on your name.

USER: Fine, Thanks for the information.

ASSISTANT: Thank you for reaching us.