You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket from DTW to AUS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are July 25 to July 27.

ASSISTANT: May I know your connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to prefer business class.

ASSISTANT: May I know your good name?

USER: Carolyn Hill.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.