You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from AUS to JFK. Could you book a ticket?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: Travelling dates are from Sept, 10 to Sept, 12.

ASSISTANT: Do you prefer any break in between journey?

USER: I would prefer connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer business class.

ASSISTANT: May I know your good name?

USER: My name is William Perez.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Thank you.

ASSISTANT: Thank you for choosing us.