You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How can I serve you the best today?

USER: Could you please book a ticket from Austin, TX-AUS to Las Vegas, NV-LAS.

ASSISTANT: Sure, I am here to assist you. When did you scheduled to travel?

USER: Travel dates are from 11/16 to 11/18.

ASSISTANT: Do you have any other requirements?

USER: Price limit is 5000. I need a direct flight.

ASSISTANT: There is a direct flight with price of 200 and 1016 flight number. Shall I proceed?

USER: Please book a flight.

ASSISTANT: May I know your good name please?

USER: My name is Helen Martin.

ASSISTANT: Your seat has been reserved with Spirit airline.

USER: Thanks.

ASSISTANT: Thank you for choosing us.