You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from DEN to DCA, Can you please help me for booking?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I would like to travel on 04/16 to return on 04/18.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Ryan Young here.

ASSISTANT: We found  a connecting flight of fare 200 with airline Spirit and number 1013. Can I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thanks for your information.

ASSISTANT: Thank you for reaching us.