You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Christopher Turner. I have to go to Las Vegas next week for my film shooting purpose, can you please book a flight ticket from Washington?

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

USER: Thank you for accepting my request, I want to take off on 12/30 and book my return ticket also on 01/01.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: I want to fly from DCA and destination airport is LAS.

ASSISTANT: Please give me a moment.

USER: Ok.

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

USER: That's perfect, please confirm this flight ticket for me.

ASSISTANT: Your ticket is booked. The flight number is 1000 and the airline is Delta.

USER: Thank you for your service.

ASSISTANT: Welcome, have a great day.