your Anata is something you should be careful using. and Everything in Japanese in context driven. For instance if the conversation is between you and let say your employee. you would probably use chichaku= late arrival with out anything else or Chichakimasu. because the person your saying it to already knows who your talking about. If there is a group of people it is more polite to use his or her name followed by appropriate suffix (san, kun, etc.) Anata seams to me should be used when your talking about someone's property that isn't right infront of you. Anata no kurama ha Doko Desu ka? (your car where is it?). Also I've heard it used between married couples to say Dear, Darling or something similar. I may be off on this so if any one has a better or a more correct explaination I would appreciate it.