You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I have a business meeting in San Francisco, can you help me for booking a flight ticket from AUS to SFO?

ASSISTANT: Sure, May I know the journey dates?

USER: My travelling dates are June 15 and June 17.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Is there any other requirements?

USER: I prefer to book a business class.

ASSISTANT: May I know your name?

USER: My name is Brenda Hill.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.