You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Charles Gonzalez. I am looking for a round trip flight from AUS, can you help me in booking the flight ticket from Austin?

ASSISTANT: May I know your travelling dates please?

USER: Sure, my planned travel dates are Aug 23 and Aug 25.

ASSISTANT: Please provide me your specifications.

USER: I am looking for connecting flight under 500 price limit.

ASSISTANT: We found a connecting flight with an airline Frontier of flight 1020 and cost is 100. Can I proceed with the booking?

USER: That's fine, please proceed in booking with this flight.

ASSISTANT: Your ticket has been booked in an economy class.

USER: Thank you for your expeditious service.

ASSISTANT: Thank you for choosing us.