Smart replies in email and messaging apps are more than a little impersonal, but that's not necessarily a bad thing with LinkedIn. Do you really want to hand-craft messages to someone who's just trying to arrange a sales pitch? You won't have to after today. LinkedIn has introduced smart message replies that use machine learning to offer up to three canned responses based on the conversation. If someone wants a business lunch, you can ask when they'd like to meet with a single tap. It's certainly cold, but it might fit the bill if you want to fast-forward through the empty formalities that often come with work-related chats.