How Are You?

I was standing in line at the local CVS. In front of me stood a twenty-something woman holding a pregnancy test. She didn't quite seem at ease (we live in a relatively small town). When it was her turn to pay for her stuff i heard the cashier say in a loud clear voice "and how are YOU today?" All i could think off wrong question to ask, a girl nervously clutching ept test probably not doing so hot. What was she suppose to say? Not bad, minus the looming potential life-alterting decision i might have to make in about a half hour and these hot flashes, i'm great CVS lady!
I kind think it's funny how people use How are you? as a greeting. But it becomes wildly inappropriate at times, like this.