You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Charles Wilson. I am planning to attend my nephew birthday in New York NY - JFK, so please help me in booking a flight ticket from DC - DCA.

ASSISTANT: Sure, may I know your journey dates?

USER: I want to fly on 01/19 and return on 01/21.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is a flight on Spirit airline, flight number as 1019 with the fare of 200.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.