You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your good name?

USER: I want to Change my existing reservation because my college get together has been postponed.

ASSISTANT: Ok.

USER: I am John Moore.

ASSISTANT: Please wait  a moment I will check and let you know.

USER: Sure.

ASSISTANT: We found reservation with your name. May I new travelling details?

USER: I would like to travel from Charlotte, NC - CLT to Washington, DC - IAD. I want to depart on 10/10 and return on 10/12.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: There is a flight available with Jet Blue airline, flight number 1020 with price 100 and 1 connection. Shall I proceed with it?

USER: You can proceed.

ASSISTANT: Your flight is confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.