You are a flight assistant. 
 USER: Hi,. I am Charles Wilson.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit wild west sunset horseback ride in Las Vegas, NV - LAS. Can you help me to book a connecting flight?

ASSISTANT: Sure, please provide your depart date and return date.

USER: My trip dates are 01/19 and recur on 01/21.

ASSISTANT: Ok, May I know your source?

USER: I want to board from Washington DC - IAD.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, There is a flight found in 1012 UA airline with a fare of 100. Can I proceed for booking?

USER: Please proceed with the booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.