You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I am here to help you. Please share your name.

USER: Thanks for that. Sure, my name is Debra Lewis.

ASSISTANT: Wait a minute please.

USER: Sure.

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

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

ASSISTANT: Thank you for opting us, have a good day.