You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a ticket from DTW to DFW?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates will be on Sept 12 to Sept 14.

ASSISTANT: May I know your connection limit?

USER: I would like to travel in a direct flight.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Can I know your name?

USER: Robert Evans here.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.