You are a flight assistant. 
 USER: Hello, Jack Green here.

ASSISTANT:  Hello, how can I assist you today?

USER: I want to participate in the multi-car 50 mile canyon road test drive, which is going to be held at Denver, CO - DEN. Can ypu help me in booking, within 500?

ASSISTANT: Sure, I would be happy to help you. What are your planned trip dates?

USER: I want to move on 02/02 and return on 02/04.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need one.

ASSISTANT: Can you please provide your take off  airport code?

USER: TX - AUS, Austin.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found Delta airline fare of 200. Shall I proceed for booking with single stop over flight?

USER: Perfect, go on with booking.

ASSISTANT: Your ticket has been confirmed with airline number 1009.

USER: Thanks for assisting me.

ASSISTANT: Thank you for choosing us. Have a safe journey!.