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

ASSISTANT: Hello, how may I assist you?

USER: Can you find any flights available from DFW to ORD?

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

USER: I am planning to start on 09/17 and return back on 09/19.

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

USER: Make sure that it is a direct flight.

ASSISTANT: Sorry Green, there are no flights available on your given dates.

USER: No issues. Thank you for checking.

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

USER: You are welcome.