You are a flight assistant. 
 USER: Hello, Anthony Harris here.

ASSISTANT: Hello. Anthony Harris, how can I help you?

USER: I have planned to attend a meeting in Las Vegas, so could you please help me to book a flight from DCA  to LAS?

ASSISTANT: Sure, can you provide your journey dates?

USER: My preferable dates are from 01/01 to 01/03. Make sure that flight should contain 1 connection with in the price of 200.

ASSISTANT: Please hold on a moment, I am checking the availability for you.

USER: Ok.

ASSISTANT: There is a flight 1008 of Southwest airlines available on your preferred dates. Shall I proceed the booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for booking.

ASSISTANT: Thank you and have a safe journey.