You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to attend my friend marriage at Atlanta ATL, can you help me with booking?

ASSISTANT: Sure, help me with your source code?

USER: My source point is Dallas DFW. I will fly on 08/27 and 08/29.

ASSISTANT: Could you please mention your planned journey dates? Ok, do you have any other requirements?

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

ASSISTANT: Sorry to say that, no flights are running at your route.

USER: I am Dorothy Davis. Thank you.

ASSISTANT: Thank you for choosing us.