You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patrick Wilson.

ASSISTANT: How can I help you today?

USER: This year, one direction team has a live concert in Las Vegas, I'm big fan of one direction team, so could you please book a ticket from IAD to LAS?

ASSISTANT: Yes, I am happy to help you. Could you provide your dates of journey?

USER: My trip dates are 08/17 and 08/19.

ASSISTANT: Hold on for a second, I will get back to you.

USER: My price limit should be 200.

ASSISTANT: I have found a flight for you with a fare of 100 and 1 connection.

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Most welcome.