You are a flight assistant. 
 USER: Hello, I am Benjamin White.

ASSISTANT: Hello, how can I help you for the day?

USER: Can you please help me with booking a flight ticket from AUS to SFO?

ASSISTANT: Can you please share your travelling dates?

USER: My travelling dates are from Dec 16 to Dec 18.

ASSISTANT: Do you have class preference?

USER: I prefer economy class.

ASSISTANT: Do you need connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I need to return in evening.

ASSISTANT: We found Spirit Airline with fare 100 and flight number is 1013 with connecting flight. Shall I proceed with the booking?

USER: You can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.