You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking my flight ticket from DTW to MSP?

ASSISTANT: Ok, may I know your trip dates?

USER: My travelling dates are from 12/27 to 12/29.

ASSISTANT: Is there any time concern?

USER: Yes, my return time should be in the afternoon.

ASSISTANT: Any more requirements?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Myself Margaret Allen.

ASSISTANT: Sorry, there is no flight running on your route.

USER: It's ok, thank you.

ASSISTANT: Thanks for reaching us.