You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I need to book a ticket from Minneapolis & St. Paul to Detroit.

ASSISTANT: Please provide your trip dates.

USER: Departure is Aug, 31 and return date is Sept, 2.

ASSISTANT: Do you need any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Can I know your preferable timings?

USER: I would like to return in the afternoon time.

ASSISTANT: Do you need any other specifications?

USER: I prefer to fly in a normal-cost airline.

ASSISTANT: May I know your name for reservation?

USER: My name is Joshua Mitchell.

ASSISTANT: There are no flights available on your routes.

USER: Thank you.