You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I need to travel to DFW for business trip, can you please help me to reserve my ticket from AUS?

ASSISTANT: Please share your travelling dates.

USER: Sure, my travelling dates are from Jul, 31 to Aug, 02.

ASSISTANT: Do you need any connection limit?

USER: I need a direct flight to travel.

ASSISTANT: Could you share me your class preference?

USER: Sure, I used to pefer business class to travel.

ASSISTANT: Do you need any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name for reservation?

USER: Sure, my name is Robert Johnson here.

ASSISTANT: There are no flights available on your routes.

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

ASSISTANT: Thank you for choosing us.