You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Susan Mitchell. Please help me to book a flight ticket from DTW to MSP.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Nov, 28 and Nov, 30 are my travel dates.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a connecting flight and my return time should be at evening.

ASSISTANT: Sorry, there are no flights available at your request.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.