You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: May I know your travelling dates?

USER: Travelling dates are Feb, 18 and Feb, 20.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other preference?

USER: I would like to prefer business class.

ASSISTANT: May I know your name?

USER: My name is Emma Turner.

ASSISTANT: Sorry, no flights available on your route.

USER: Thank you.