You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to book a flight ticket to ATL from DEN, can you please help me out?

ASSISTANT: Sure, may I know your itinerary dates?

USER: Sure, my planned travelling dates are Sept 06 and Sept 08.

ASSISTANT: May I know your name?

USER: Sure, my name is Rebecca Young.

ASSISTANT: Which class do you prefer?

USER: Any class is ok for me.

ASSISTANT: Please give me a moment.

USER: Ok, I prefer direct flight.

ASSISTANT: Sorry Rebecca young, no direct flight is available on your route.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.