You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service your looking for?

USER: Can you please help me with booking a flight ticket from DTW to SFO?

ASSISTANT: Sure, please share me your travel dates.

USER: My travelling dates are from Sept 12-14.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I would be comfortable with single stop over.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Justin Evans here.

ASSISTANT: May I know your class preferences?

USER: I prefer business class.

ASSISTANT: May I know your arrival and depart timings?

USER: I am comfortable with any time.

ASSISTANT: We found a Frontier airline and 1001 is flight number with a fare of 700. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket is confirmed with a business class.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.