You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I planned to meet my friend in ORD, can you please help me to book a flight ticket from AUS?

ASSISTANT: Sure, may I know your travelling dates?

USER: I prefer to travel on Dec 9 and Dec 11.

ASSISTANT: Can I know your class preferences?

USER: I prefer to travel in business class.

ASSISTANT: May I know your other specifications?

USER: I prefer to travel in a connecting flight.

ASSISTANT: May I know your name?

USER: I am Kathleen Anderson.

ASSISTANT: There is no flight available on your request.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.