You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mark Moore.

ASSISTANT: How can I assist you today?

USER: I am planning to book a flight ticket from LAS to DCA. Can you please help me with booking?

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

USER: My travelling dates are from 12/22 to 12/24.

ASSISTANT: Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is a flight with price 200 and the connections 1 is available. Shall I confirm your ticket?

USER: Yes, please confirm with that flight ticket.

ASSISTANT: Your ticket is booked. The flight number is 1020 and the airline is UA.

USER: Thank you for booking my ticket for the flight- 1020.

ASSISTANT: Welcome, have a great day.