You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight ticket from AUS to EWR?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are June 18 to June 20.

ASSISTANT: Is there any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer business class.

ASSISTANT: May I know your good name?

USER: James Campbell.

ASSISTANT: There were no flights found with your required dates to travel.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.