You’ve never met her, but she’ll be your new assistant. For the hour. Or the day. Or however long you need. She (or he) will pick up your clothes, build your furniture, or check in on you after surgery. She’ll even help you prank your coworkers, encourage you to write that book you’ve been meaning to start and give you a morning wake-up call. Welcome to the age of assistance for the 99 percent who don’t have a full-time salaried employee to do their bidding, but also don’t have the minutes to spare for the holiday shopping, or dry cleaning pick-up. Enter the virtual assistant. Working remotely from a smartphone app or a website, these new assistant-providing companies will do everything a traditional ...