Going up ...

You press the button, and wait. The familiar bell dings. The doors open; you enter. You wait for the doors to close. Someone rushes in with an appreciative smile. "Thanks. New to the building and can't believe how slow this elevator is ... I see you're one floor above us, what do you all do?"

There it is. The set-up. Respond well, you may have a new client, a new boss, a new friend. Stutter, you botch your first impression and could lose more business than you even know about -- since the power of a network is powerful indeed.

Follow the basics. "Thanks for asking. I'm (name) with (company). We (purpose) for (target audience)." But don't keep it all about you; reciprocate with a question. Start a conversation. The best thing that could happen would be for it to get interrupted at the 12th floor so that you can reconnect later.

Go ahead, press the button.