You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from DTW to DEN?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to depart on Apr 16 and need to return on Apr 18.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: Dorothy Robinson here.

ASSISTANT: Frontier Airlines is providing direct flight with the ticket fare of 100 and depart time is 15:00 hours, arrival time is 15:00 hours. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed by flight number 1005 and an economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.