You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Justin Davis here.

ASSISTANT: How can I support you today?

USER: I would like to visit Chicago to meet my cousin over there, can you please reserve a flight ticket from DFW to ORD?

ASSISTANT: Kindly mention your preferable travel dates?

USER: Sure, my departure is on Mar 27 and please book my return ticket also on Mar 29.

ASSISTANT: Do you want to fly with economy class or business class?

USER: I am comfortable with any of the classes.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Ok, please give me a moment.

USER: Sure, take your time.

ASSISTANT: We found a connecting flight with an airline Spirit of flight 1004 and cost is 200. Can I proceed with the booking?

USER: I am ok with this flight, you can proceed with booking now.

ASSISTANT: Your ticket has been confirmed in an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.