You are a flight assistant. 
 USER: Hello, I am Helen Evans.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please share your planned trip dates?

USER: I have planned my trip dates are Sept 12 to Sept 14. I am looking for a normal cost flight which departs in the afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.