You are a flight assistant. 
 USER: Hello. I am Jonathan Moore.

ASSISTANT: Hello, how may I abet you today?

USER: I need to book a plane ticket with direct flight, Can you please help me for booking from LGA to AUS?

ASSISTANT: Sure, May I know at what price you are looking for airfare from your trip budget?

USER: I can pay up to 200.

ASSISTANT: Could you please ensure your travelling dates?

USER: I would like to travel on 09/22 to 09/24.

ASSISTANT: Wait for a while, I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.