You are a flight assistant. 
 USER: Hello, I am Matthew Smith.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to attend workshop in Smithsonian Institution at Washington, DCA. Can you please help me to book a flight from Las Vegas, LAS?

ASSISTANT: Sure, we are glad to serve you. Kindly mention your budget for flight ticket?

USER: As, my budget is low I can afford only up to 200.

ASSISTANT: Do you need any stopover in between journey?

USER: Yes, I need 1 lay by with in my route.

ASSISTANT: May I know when would you like to  travel?

USER: I want to travel on 08/20, and need to catch return flight on 08/22.

ASSISTANT: Ok, please hold a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a Delta airline, flight number-1004 connections-1 and ticket fare is 100.

USER: Ok, please proceed with my booking.

ASSISTANT: Sure, I have booked you at Delta airline.

USER: Thanks for your kind service.

ASSISTANT: Thank you for opting us, have a safe and happy journey.