You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Patricia Hill here. I want to travel from ATL to MSP. Can you please help em for booking the flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: My departure date is 01/08 and return date is 01/10. Make sure my price limit is 500.

ASSISTANT: There is no flight on your desired travel dates.

USER: Anyway thanks for the information.

ASSISTANT: Thank you for opting us.