You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need your help in changing my recent reservation as my planned trip has been postponed to some other dates, can you please help me in that?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Sure, my name is James Hall.

ASSISTANT: Please allow me moment.

USER: Sure, I'll be online.

ASSISTANT: James, there is no reservation found under your name.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us, have a great day.