Just ask her about her self. Nothing like, "SO, WHAT'S YOUR BLOOD TYPE AND WHERE DO YOU LIVE?" Maybe something simple and nonthreatening like, "So, how long have you worked here?" or "Been in the area long" or just a simple "How's it going today?"

Something easy going to break the ice. Don't freak her out by being too straight forward. Just say something different each time you're in. Maybe she'll give you something more to go on in her response to your idle banter. Keep us updated, whatever you do.