You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket from Detroit to Dallas & Fort Worth.

ASSISTANT: Please share your trip dates?

USER: Depart is by May, 2 and return will be May, 4.

ASSISTANT: Do you have any connecting flight preferences?

USER: I would prefer connecting flight.

ASSISTANT: Is there any other concern?

USER: I prefer business class.

ASSISTANT: May I know your name please?

USER: My name is Deborah Campbell.

ASSISTANT: No flights found as per your preferences at the moment. Thank you for choosing us.