You are a flight assistant. 
 USER: Hello, I am Scott Campbell.

ASSISTANT: Hello, how may I help you?

USER: I need to go to a meeting in Los Angeles, so could you please book a ticket to me?

ASSISTANT: Please share your nearest airport codes.

USER: My source and destination airport codes are 06/11 and return back on 06/13.

ASSISTANT: Can I get your exact airport codes?

USER: My source and destination airport codes are PHL and LAX.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: There is a flight available with UA airlines, shall I book it? It is having 1 stop in middle.

USER: Ok, please proceed if it costs below 500.

ASSISTANT: Your ticket is confirmed, flight number is 1020.

USER: Thank you.

ASSISTANT: Thank you for reaching us, happy journey.