You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Garcia.

ASSISTANT: Gregory, how can I aid you today?

USER: I am planning to attend business meeting at DFW, can you please help me with booking a flight ticket from ATL?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Sure, I would like to take off on Apr 17 and return on Apr 19.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok, but please make sure that the connection limit is 0.

ASSISTANT: Sorry Garcia, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.