You are a flight assistant. 
 USER: Hello.

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

USER: Can you please reserve a flight ticket from Detroit to Las Vegas?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Thank you. I want to start my journey on Sept 17 and return back on Sept 19.

ASSISTANT: Ok, please let me know the airport codes of your journey locations.

USER: My genesis and terminus airport codes are DTW and LAS.

ASSISTANT: Are you looking for any connecting flight or direct flight only you want?

USER: I would like to fly in a connecting flight.

ASSISTANT: Ok, please let me know the timings of your journey to get best flight for you.

USER: Yes, I am looking for a flight which is departing in the afternoon  time.

ASSISTANT: Can I have your good name please to proceed further?

USER: My name is Paul Jones.

ASSISTANT: UA airlines running a flight in your route with connection 1 and the ticket fare is 100 in economy class. Are you ok with this flight?

USER: This is perfect flight for me, please go ahead with the ticket booking.

ASSISTANT: Ok, your ticket booking has done and the flight number is 1009.

USER: Thanks a lot for your guidance in booking my ticket.

ASSISTANT: Thank you for choosing us, have a great journey.

USER: You are most welcome.