You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: As my planned trip has been postponed to some other dates, I need your help in changing my recent reservation.

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed further?

USER: Sure, my name is Donna Martin.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

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

ASSISTANT: Thank you for opting us.