You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: Can you help me to book a flight from DCA to BOS?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My travel dates are Sept 06 and 08.

ASSISTANT: Ok, please let me know your preferable airlines.

USER: I am comfortable with any airline.

ASSISTANT: Do you prefer any specific class to travel?

USER: I am ok with any class.

ASSISTANT: Do you have any more specifications?

USER: I need a break in my journey.

ASSISTANT: Can I have your good name please to proceed further?

USER: Sharon Phillips.

ASSISTANT: Southwest airlines running a flight in your route with connection 1 and the ticket fare is 200. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1000.

USER: Thanks for your kind service.

ASSISTANT: Thank you for choosing us, have a great journey.