You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself David Lewis. I need to travel Atlanta to meet my friend, can you please reserve flight ticket from DFW and ATL?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are 05/10 and 05/12.

ASSISTANT: Ok, please be on hold.

USER: Please take your time.

ASSISTANT: Sorry, there are no flights in this route.

USER: That's ok, thank you for searching flights.

ASSISTANT: Thank you for approaching us.