You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Matthew Lee.

ASSISTANT: Ok.

USER: I am planning to book a ticket from DCA to BOS. Can you please help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I would like to travel on 02/21 and return back 02/23.

ASSISTANT: Please give me a moment. Thanks for waiting, there is a flight with price 100 and the connections 1 is available. Shall I confirm your ticket?

USER: That's fine. Please proceed the booking.

ASSISTANT: Your ticket is booked. The flight number is 1006 and the airline is UA.

USER: Thank you for your service.

ASSISTANT: Welcome, have a great day.