You are a flight assistant. 
 USER: Hello,. I am Katherine Anderson.

ASSISTANT: Hello,. How can I help you today?

USER: I want to go for Austin Brewery tour along with my friends on 11/19. Can you book a return flight on 11/21?

ASSISTANT: I will assist you in booking your ticket.

USER: Thank you.

ASSISTANT: I need your airport codes for booking further.

USER: My departure is from New York, NY - JFK and arrival is to Austin, TX - AUS.

ASSISTANT: Do you have any other specifications?

USER: Price limit should not exceed 500.

ASSISTANT: We have found a direct flight to AUS.

USER: Sorry, I need a connecting flight.

ASSISTANT: There is no connecting flight available for your route on your dates of travel. Thank you for opting us.

USER: Thanks for your information.