You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am William Anderson. Can you please  book a flight ticket from DTW to CLT?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Sure, I need to travel on dates  of Apr 28 and Apr 30.

ASSISTANT: Do you have any connection limit?

USER: I am ok with any connections except two.

ASSISTANT: May I know your arrival and depart timings?

USER: I would like to depart in the evening time.

ASSISTANT: Which class do you prefer either economy or business?

USER: Actually, I am ok with any class to travel.

ASSISTANT: Do you have any specifications?

USER: No,  I am ok with any airlines.

ASSISTANT: We found a connecting flight of fare 200 with airline United and number is 1020. Can I proceed?

USER: That is fine, please proceed with booking.

ASSISTANT: Your ticket has been confirmed in economy class and depart time is evening.

USER: Thank you for your help.

ASSISTANT: Thank you.