You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Benjamin Hall here.

ASSISTANT: How may I help you?

USER: I would like to prefer a economy class for my business trip to Charlotte. So can you book the flight ticket for me?

ASSISTANT: Sure, can I know your travel dates?

USER: The trip dates from Feb 26 to Feb 28.

ASSISTANT: May I know your airport codes?

USER: The airport codes are from DTW to CLT.

ASSISTANT: Ok, is there any other preferences?

USER: I prefer a stopover flight.

ASSISTANT: Ok, please tell me your requirements.

USER: That is it.

ASSISTANT: There is a flight in an United airlines with the ticket cost 100. Can I book the ticket?

USER: You can book the flight ticket.

ASSISTANT: I have booked your ticket with the flight-1004.

USER: Thank you.

ASSISTANT: Have a safe flight. Thank you for approaching us.