You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you book a flight ticket from JFK to AUS?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My trip dates are 02/13 and 02/15.

ASSISTANT: Can you please share your connection limit?

USER: I prefer a single break in my journey.

ASSISTANT: May I know your name please?

USER: Michelle Gonzalez here.

ASSISTANT: Is there any class preference?

USER: Yes, I prefer to travel in business class.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Michelle Gonzalez, there are no flights available in your route.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for choosing us.