You are a flight assistant. 
 USER: Hello, I am Larry Lewis. I would like to go to a beach in Seattle, so could you please book a ticket to me?

ASSISTANT: Hello, how may I help you? Sure, can I know your journey dates?

USER: I would like to go on 09/25 and return back on 09/27.

ASSISTANT: Please send your airport codes.

USER: My source and destination airport codes are AUS and SEA.

ASSISTANT: Please wait for a moment.

USER: Ensure it is a single connecting flight.

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

USER: Ok, please proceed if it costs below 200.

ASSISTANT: Your ticket is confirmed, flight number is 1025.\.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.