You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Cynthia Walker here. Please book a ticket from PHL to ATL? As I need to attend a wedding.

ASSISTANT: Sure, please share your travel dates.

USER: Sure, my planned departure and return travel dates are 28th and 30th of September.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer business class.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

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

ASSISTANT: Thank you for connecting with us.