You are a flight assistant. 
 USER: Hello. I am Dennis Wilson.

ASSISTANT: Hello, how may I aid you today?

USER: I have a meeting at Austin, so could you please guide me with flight ticket booking which will return back in the afternoon time?

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, my trip dates are Aug 10 and 12.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I can travel in any flight.

ASSISTANT: Do you want to travel in connecting flight or direct flight?

USER: I need a single stop flight for my journey.

ASSISTANT: May I know your source airport code?

USER: My source location airport code is LGA and my destination location airport code is AUS.

ASSISTANT:  Please share if you want to travel in any specific time?

USER: I need a specific time in my return journey which will be on afternoon time.

ASSISTANT: Please wait for a while. Sorry to say that, there are no flights available on the routes of your journey.

USER: No problem with that one, thank you for your help and providing the information.

ASSISTANT: Thank you for opting us.