ON a recent Skywest aka UX flight from ONT-LAX, the woman who sat in 9B had the look of someone who didn't travel lots. FA went through cabin asking those in exit rows if they were willing and able to assist in the event of an emergency. Woman looked startled and said "Let me study the material first and tell you." At that point the fa looked startled, but I think was also pleased that someone took it so seriously. Woman then read the briefing card and in a couple of minutes signaled to the fa her ok. I appreciated the woman's candor and willingess to take it seriously.