I'm trying to remember the title and author of a literary short story. The premise as best I can remember it involved a woman, looking for someone to light her cigarette, unwittingly wondering into a mental asylum (it was set in that era of psychiatry, I believe) and being trapped there. Her attempts to convince the (sadistic?) orderlies that she's sane only backfire and when she manages to call her lover on the phone, he doesn't believe her either. I think it was written by a famous Latin American author in the mid 20th century. Google is being no help at all, but maybe you know the story I'm thinking about?