You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a flight ticket from DTW to DEN?

ASSISTANT: Sure, can you share your planned trip dates?

USER: Yes, my trip dates are Sept 21 and Sept 23.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Kindly, mention your arrival and depart timings.

USER: I am comfortable to travel at any time.

ASSISTANT: Are there any other specifications?

USER: I prefer to travel in well known airlines.

ASSISTANT: Please forward your name.

USER: My name is Scott Green.

ASSISTANT: We found a connecting flight of fare 100 with airline Spirit and number 1009. Can I book?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for the help.

ASSISTANT: Thank you for availing us.