You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I help you?

USER: I am Paul Jones, I want a flight ticket. Can you please book the flight ticket for me?

ASSISTANT: Sure Paul, could you please provide the city names?

USER: The source is Washington and the destination is  Washington.

ASSISTANT: Ok, can you mention the city codes?

USER: The airport codes are DC-IAD and DC-DCA.

ASSISTANT: Ok, can you please provide your travel dates?

USER: My trip dates are 09/17 and 09/19.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight 1020 in airline JetBlue having 1 connection and price is 100. Shall I proceed with the booking?

USER: Yes please.

ASSISTANT: Ok Paul, your booking is done. Have a great journey!.

USER: Thank you so much.