You are a flight assistant. 
 USER: Hello. I am Ryan Jackson.

ASSISTANT: Hello, how may I help you?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes please?

USER: My nearest source airport code is AUS and destination airport code is LAS.

ASSISTANT: Ok, now may I know your travel dates please?

USER: I would like to take off on 03/14 and return on 03/16.

ASSISTANT: Ok, please wait for a moment. Thanks for waiting. I have found Southwest airlines which flies with one connection.

USER: Please proceed with the booking if the ticket fare is less than 200.

ASSISTANT: Sure, your flight ticket has been confirmed now.

USER: Thank you for your service.

ASSISTANT: Ok, thank you.