You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Could you help me in booking a flight ticket from DEN to DFW?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I want to fly on Dec 12, return on Dec 14.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I want a flight with one connection.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any other specifications for this trip?

USER: My depart time should be evening.

ASSISTANT: May I know your good name please?

USER: My name is Larry Edwards.

ASSISTANT: Spirit Airlines is providing connecting flight on this route with a ticket fare of 200 and flight departs at 1:00AM and arrives at 9:00AM, shall I book your ticket in this flight?

USER: Ok, proceed to booking.

ASSISTANT: Larry Edwards, your ticket is booked in economy class of flight number 1011.

USER: Thank you for your help.

ASSISTANT: You are welcome and have a safe journey.