You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Brandon Brown. I am planning to give bear party to my friends, Can you please book a ticket on 04/19?

ASSISTANT: Sure. May I know your airport codes of journey?

USER: It's a round trip and my airport code is Austin, AUS.

ASSISTANT: When are you willing to return?

USER: After completion of party, I will return on 04/21.

ASSISTANT: Do you need lay by in between your journey?

USER: I need a single connection in between my journey.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available with Delta airline, flight number 1001 with fare 100 and a lay by.

USER: You can proceed.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for opting us.