You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What hand help that you need form my side?

USER: Brenda Harris here. I want to travel from ATL to LAX for attending a Robotics workshop. Can you please help me for booking the flight ticket?

ASSISTANT: Yes, on what dates that you are planning your trip?

USER: My departure date is 01/01 and return date is 01/03. Make sure my price limit is 500.

ASSISTANT: Thank you for your information.

USER: My pleasure.

ASSISTANT: I am sorry that, there are no flights available on the trip dates which you have provided.

USER: Anyway, thank you for the information.

ASSISTANT: Most welcome.