You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you  please book a flight ticket from DTW to MSP?

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

USER: Thank you. I have planned my travel dates as Feb 17 and Feb 19.

ASSISTANT: Ok, do you have any other requirements?

USER: I am looking for  direct flight so please make sure that.

ASSISTANT: May I know your full name?

USER: Sure, myself Melissa Williams.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flights available based on your journey dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.