You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I have planned to postpone my trip, can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your name?

USER: Robert Wright.

ASSISTANT: I have found your reservation, may I know your new airport codes?

USER: Origin is from CLT and Depart IAD.

ASSISTANT: Let me know your travelling dates?

USER: My preferred dates are Nov 6th and Nov 8th.

ASSISTANT: Do you have any requirements?

USER: I need to travel in economy class.

ASSISTANT: There is a connecting flight 1023 of Spirit airlines, can I proceed?

USER: Proceed.

ASSISTANT: Your booking is done.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.