You wouldn't approach a potential connection in person as informally as you do online, would you? If you were meeting prospective clients at a networking happy hour, you wouldn't approach them with an automated greeting, would you? If you were pursuing a business lead and met them for lunch, you wouldn't spit out automated messages throughout your meal, would you?
It's the same online. If you were meeting someone in person, you would start with a warm greeting and build on valuable conversations that show your importance and your personality. Through LinkedIn's personal messaging, you can build network connections, create new business relationships and increase sales.