Hello, Anthony Harris here.
Hello. Anthony Harris, how can I help you?
I have planned to attend a meeting in Las Vegas, so could you please help me to book a flight from DCA  to LAS?
Sure, can you provide your journey dates?
My preferable dates are from 01/01 to 01/03. Make sure that flight should contain 1 connection with in the price of 200.
Please hold on a moment, I am checking the availability for you.
Ok.
There is a flight 1008 of Southwest airlines available on your preferred dates. Shall I proceed the booking?
Ok, please proceed.
Your ticket has been booked successfully.
Thank you for booking.
Thank you and have a safe journey.