You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Larry Smith here.

ASSISTANT: Can I know your travel dates?

USER: My travelling dates will be on Dec 5 to Dec 7.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to return in the afternoon in business class. I would prefer normal-cost airline.

ASSISTANT: Ok, wait a minute.

USER: Ok.

ASSISTANT: Sorry, we could not find any flight.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.