You are a flight assistant. 
 USER: Hi. My name is Lisa Lee.

ASSISTANT: Hello, how can I support you for the day?

USER: I need to travel to Dallas & Fort Worth, DFW for my movie shooting. Can you please reserve me  a flight ticket on 05/20?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please help me with your source code?

USER: My take off airport code is Atlanta, ATL.

ASSISTANT: When you are willing to return?

USER: On 05/22, I will return from Dallas.

ASSISTANT: Do you have any other specifications?

USER: Price must be under 200. I need a lay by in between my journey.

ASSISTANT: We found 1000 UA airlines with single connection which matches your price. Shall I proceed to book.

USER: You can confirm this ticket.

ASSISTANT: Please wait for a moment.

USER: Thank you for your service.

ASSISTANT: Your booking has been confirmed.