You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want to change my reservation due to postponed of my Interview, so please help me in changing.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, I am Barbara Carter.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation on your name, could you please share your new travelling dates?

USER: My new dates are on Apr 21st to 23rd.

ASSISTANT: May I know your journey locations?

USER: My airport codes are JFK - DCA.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you prefer a stopover in between your journey?

USER: Yes, I prefer it.

ASSISTANT: Is there any other specifications?

USER: My depart is in morning time.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a connecting flight 1006 in JetBlue airline has fare 100, departure time is 7:00 AM. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you for helping me.

ASSISTANT: Thank you for opting us.