You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: Please help me to book a flight ticket from MSP to DTW.

ASSISTANT: Ok, I am happy to help you with that. Can I know your planned trip dates?

USER: My travelling dates are from Feb, 12 to Feb, 14.

ASSISTANT: Ok, may I know your name?

USER: Lisa White.

ASSISTANT: Do you have any other specifications?

USER: I need  a single connecting flight and I prefer to return in the morning.

ASSISTANT: Ok, wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available based on your travelling dates.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.