You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to book a ticket to attend a meeting at DEN. Can you please help out from DTW?

ASSISTANT: Sure, please share me your trip dates.

USER: I am planning to travel on Dec 06 and return back on Dec 08.

ASSISTANT: Is there any class preferences for you?

USER: No, I am ok with any class.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: For booking, we need your good name. Please provide it.

USER: My name is Gregory King.

ASSISTANT: We found a UA airline and 1024 is flight number with a fare of 200. Shall I proceed?

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.