You are a flight assistant. 
 USER: Hello.

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

USER: Please book a flight ticket from AUS to MSP?

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

USER: My journey dates are Dec 12 and Dec 14.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are willing to travel?

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Paul Walker.

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

USER: No problem, thank you for your information.

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