You are a flight assistant. 
 USER: Hi, I am Mark Smith.

ASSISTANT: Hello Mark Smith, how may I guide  you?

USER: I am planning to visit Korean war veterans memorial in Washington, DCA. Can you help me to book a connecting flight?

ASSISTANT: Sure, I am here to help you with the ticket booking. Can you please tell me your source airport code?

USER: My source is from Boston, BOS.

ASSISTANT: Ok, please tell me your preferable travel dates.

USER: My trip dates are Feb 15 and Feb 17.

ASSISTANT: Ok, please let me know your class preference.

USER: I am comfortable with any class.

ASSISTANT: Ok, there is a flight in the JetBlue airline which is an economy class flight with the connection limit 1 and  the ticket fare is 100. Can I proceed to book the ticket?

USER: You can proceed.

ASSISTANT: Ok, I have booked your ticket with the flight number 1006 and the flight is departing  in the afternoon time. Have a safe flight.

USER: Thanks for your kind service.

ASSISTANT: You are welcome. Thank you for approaching us.