You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My journey dates are May 25 and May 27.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I prefer a business class.

ASSISTANT: May I know your name?

USER: I am Patricia Campbell.

ASSISTANT: Sorry, there were no flights with your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.