What's in a name?

A word about my name: Sarah. In Europe they like to pronounce it Sah-rah kind of like the Sahara desert. I don't like it pronounced that way. I prefer "Sera" like "buonasera" (good evening). Problem is that when guys are trying to talk to me in the street they usually turn to me and say " 'sera", as in, a shortened form of good evening. This trips me out because for just one second I think, "How do they know my name? Do I know this person?" And by the time I recover they are talking to me because they caught my confused smile and they think that is an invitation to continue talking to me. And this is why I meet so many guys here.