Suspiciousness

Sometimes I'll call a number for work, and I'll have to ask for a guys name when the woman answers. I always get super embarrassed when she says "no, he's not home at the mome-WHO IS THIS?" I feel guilty, like I've done something wrong, but I guess I do sound super young on the phone, that can't help. Just for kicks I should start making up stories like, "he gave me his name at the bar last week...WHO ARE YOU?"