You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me in booking a flight ticket to MSP from DTW in the month of December?

ASSISTANT: Sure, can you help me with your travelling dates?

USER: Sure, my travelling dates are Dec 11 and Dec 13.

ASSISTANT: Do you have any connection preferences?

USER: I need a direct flight for my journey.

ASSISTANT: May I know your name?

USER: Ok, my name is Daniel Miller.

ASSISTANT: Sorry to say, no flight is available for you.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.