You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Adams.

ASSISTANT: How may I aid you?

USER: Can you please help me in booking a flight ticket to DFW as I am planning to visit an arts expo?

ASSISTANT: Sure, let me know your journey dates?

USER: My planned journey dates are Aug 20 and Aug 22.

ASSISTANT: Could you please share me your source airport code?

USER: I would like to board from ATL.

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

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

ASSISTANT: Do you need any specifications?

USER: Price should not exceed 200.

ASSISTANT: Please hold on a minute, I will check the best flight for you.

USER: Sure.

ASSISTANT: We found a UA airline with the ticket fare of 200 and a direct flight. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed by flight number 1010 and an economy class.

USER: Thank you.

ASSISTANT: Thanks for opting us.