You are a flight assistant. 
 USER: Hello, I am Jonathan Brown.

ASSISTANT: Hello Brown, how may I help you?

USER: I have an international conference at United Nations Headquarters in New York, NY - JFK.

ASSISTANT: Great, can I know your source airport code and your travel dates?

USER: Make sure that my return date should be 09/27 and depart date is 09/25.

ASSISTANT: Ok.

USER: My origin point is Washington, DCA and landing point is JFK.

ASSISTANT: Ok, just wait for a while.

USER: Ok.

ASSISTANT: Jet Blue airline is providing a flight for you but the fare is 100. Do you like me to proceed with this flight?

USER: Sure, proceed for booking. Can you let me know the flight number?

ASSISTANT: Yes, your ticket has been booked with the fight number 1001.

USER: Thank you for your help.

ASSISTANT: My pleasure.