You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am attending my brother's marriage at Austin, can you please help me in booking the ticket?

ASSISTANT: I am happy to help you, can you please share us your trip dates?

USER: My trip dates are from 10/14 to 10/16.

ASSISTANT: May I know your source and destination airport codes?

USER: My origin airport code is DCA and my destination airport code is AUS.

ASSISTANT: Please wait, let me check for the available flights.

USER: Please find me a direct flight on this route.

ASSISTANT: Before I proceed, may I know your name please?

USER: My name is Matthew Jackson.

ASSISTANT: Sorry Jackson, there are no flights available on your preferred dates.

USER: Ok, no issues. I will find any alternate for this trip.

ASSISTANT: What else can I do for you?

USER: No, thanks for your information.

ASSISTANT: Thank you for contacting us and have a nice day.

USER: Welcome.