You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to meet my brother at Atlanta, please help me in booking a ticket from DTW to ATL.

ASSISTANT: Sure, can you please forward your trip dates?

USER: My planned trip dates are on Aug 2 and Aug 4.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight for my trip.

ASSISTANT: Do you have any class preference?

USER: Any class is comfortable for me.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: May I know your name, please?

USER: My name is George Baker.

ASSISTANT: Thank you for reaching us.