You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Hill here.

ASSISTANT: How can I assist you at this moment?

USER: I want to attend a Marriage in Austin. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My travelling dates are 12/20 and 12/22.

ASSISTANT: May I know your airport codes of journey please?

USER: My airport codes are LAX and AUS.

ASSISTANT: Can you please provide your connection limit on this route?

USER: I want to prefer single connection limit flight. I want to departure on afternoon.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Raymond Hill, there are no flight services available on this route with your preferences.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for contacting us.