The New York Times Magazine reported last year that 40 million Americans had visited at least a dating site in a single month. And with 40 million people competing for dates, somebody’s going to want an edge. Enter screenwriter Evan Katz. He turned his talent for writing plausible, lovable fictional characters — into a for-profit business getting real dates for real people. He calls his business e-cyrano, as in Cyrano of Bergerac. Although Katz doesn’t have the giant nose. Lori Gottlieb tells the story.