You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Martinez.

ASSISTANT: How can I assist you today?

USER: Can you please assist me in booking a flight ticket from IAD to BOS?

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

USER: Sure, I have planned to travel in the dates of 12/18 and 12/20.

ASSISTANT: Please give me a moment.

USER: Ok, please make sure that the connection limit is 1.

ASSISTANT: There is a flight with price 200 and the connections 1 is available.

USER: Yes, you can book the ticket to this flight.

ASSISTANT: Your ticket is booked. The flight number is 1003.

USER: Thank's a lot for your kind help.

ASSISTANT: Welcome, have a great day.