Do 你 really care how I am? 或者 are 你 just expecting me to say "I'm fine" because that is the generic response society has taught us to say? What if I told 你 that I am depressed, hurt, lonely, aggravated, lost, fed up, frustrated, lifeless and every other negative emotion 你 could feel? Would 你 just tell me "That's too bad" and go on with whatever mundane thing 你 are doing? 或者 would 你 try to figure out why I am feeling that way and how 你 can help stop it? Don't ask me that 问题 if 你 are really only interested in one answer.
At least, in the US everytime I walked into an elevator and 说 hi, everyone 说 "how are ya" So actually, 你 should do this;
*burst into tears* It's HORRIBLE! Just HORRIBLE! *makes up some story about a dying goldfish and a phobia of papercuts* *elevator doors open* "Have a nice day!" *walk out smiling*