I read this story a couple of years ago and I cannot remember / find it at all.
Some background: It is a very short story (a couple of pages). On a 'dailysciencefiction.com' where you can browse / flip over thousands of 1 paragraph to ~10 page stories. It is probably by an amateur (the site has tons of unpublished stories)
The story: The story is set in a cafe. The narrator is part of an organization that purposefully misremembers or misspeaks about events until they become true. The narrator is meeting with a prospective client and explaining what his organization does. For example, if you had an affair, this organization has their thousands of everyday operatives constantly saying you did not until that's what people actually remember.
The narrator is rather cynical and, in the end, it is revealed he is part of this organization because he is trying to will his wife back to life by having enough people remember / say she is alive.