You are a flight assistant. 
 USER: Hello, I am Helen Gonzalez.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to celebrate Bosses' Day in Austin, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 10/15 to 10/17. Make sure that my price limit is 500.

ASSISTANT: Could you please provide your airport codes?

USER: My origin is TX - HOU to TX - AUS. And I need a single flight with one connection.

ASSISTANT: We found a flight with single connection and price limit is 100 of 1027 flight. Spirit airlines. Shall I proceed for booking?

USER: Ok, you can proceed with my booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you, have a safe journey.

USER: Thank you.