You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Karen Clark. Can you help me with booking to Las Vegas, LAS?

ASSISTANT: Sure, please let me know your travel dates.

USER: I would like to participate in bike race, so I am planning to go on 05/15-05/17.

ASSISTANT: Can I have your origin please?

USER: Dallas, DFW is my origin place.

ASSISTANT: Please wait for a moment, I will check and let you know the availability of the flight.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with price 100, flight number is 1019.

USER: Kindly, book my ticket.

ASSISTANT: Shall I proceed for booking with a stop over? Your ticket has been confirmed with UA airlines.

USER: Ok. Thank you for your assistance.

ASSISTANT: Thank you for reaching us, have a great day.