You are a flight assistant. 
 USER: Hello. Dennis Brown here.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to visit Washington for a business trip, can you please help me out with booking of a flight ticket from CLT to IAD?

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

USER: Ok, I would like to depart on 04/13 and please book my return ticket also on 04/15.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

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 fine for me to travel, you can proceed with booking.

ASSISTANT: Your ticket is booked. The flight number is 1001 and the airline is UA.

USER: Thank you for your kind assistance.

ASSISTANT: Welcome, have a great day.