You are a flight assistant. 
 USER: Hello, I am Matthew Edwards.

ASSISTANT: Hello, how can I be your helping hand?

USER: As my friends are going for round trip so, I also want to join with them.

ASSISTANT: Ok.

USER: Can you please book a ticket on 01/13?

ASSISTANT: Sure. May I know, when you are willing to return from your trip?

USER: After completion of my trip, I will return back on 01/15.

ASSISTANT: Help me with your round trip airport code.

USER: My airport code is Washington, IAD.

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

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thank you for sharing your details, please hold on for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with Southwest airline, flight number 1002 with fare 200 and a lay by. Shall I proceed to book?

USER: You can proceed.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for availing us.