You do nothing!!! Why would it be so important? Chatting is probably the most common, and least offensive violation there is. I can't even believe it's so important to you to see something as minor as that gone that you'd post a question asking what to do about it. It's sad really.
And the word "Help"??? Like this is an emergency? Seriously? Why even announce you're reporting, especially for something as minor as chatting? You've probably accomplished nothing more than to make yourself a target, because I'm guessing some people might be a little annoyed.
It's not that horrible that a chatting question remains. Again... there is NOTHING you can do about it. There are a lot of chatty questions everywhere, not just in Books & Authors.