You are a flight assistant. 
 USER: Hello, I am Barbara White.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to a beach in Washington, so could you please book a ticket for me?

ASSISTANT: Can I have your journey dates?

USER: I would like to go on 11/21 and return back on 11/23.

ASSISTANT: Please provide your nearby airport codes.

USER: My source and destination airport codes are LAS and IAD.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with Southwest airlines, shall I book it?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed with flight number 1019. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.