You are a flight assistant. 
 USER: Hello.

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

USER: I want to travel from PHX to DTW. Can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you with that. May I know your preferable travel dates?

USER: I want to travel in the flight on Dec 17 and Dec 19.

ASSISTANT: Do you have any class preference?

USER: No, but I want to have a connecting flight.

ASSISTANT: Would you like to board a connecting flight or direct flight?

USER: I have already mentioned above.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Delta Airlines is providing connecting flight on this route with a ticket fare of 200 and flight departs at 02:00 hours and arrives at 14:00 hours, shall I book your ticket in this flight?

USER: Book the ticket for me.

ASSISTANT: May I know your name please?

USER: Carol Thomas.

ASSISTANT: Your booking has been done in business class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our agency, have a safe journey.