Wired: A few hundred Bay Area Facebook users have opened their Messenger apps to discover M, a new virtual assistant. Facebook will prompt them to test it with examples of what M can do: Make restaurant reservations. Find a birthday gift for your spouse. Suggest — and then book — weekend getaways. It won’t take long for Messenger’s users to realize M can accomplish much more than your standard digital helper, suspects David Marcus, VP of messaging products at Facebook. “It can perform tasks that none of the others can.”