You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am looking to book a flight ticket from LAS to AUS. Can you help me for that?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are Nov 16 and Nov 18.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer to book a business class.

ASSISTANT: May I know your good name please?

USER: My name is John Evans.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.