Greetings, friendly oracles of the garden world

My lone female holly bush has started to produce little white flowers.
(The garden centre didn't tell me that it was female and that I need a
male within 50 feet to fertilise it.)

My presumption is that, since there are no male holly bushes within a
five-mile radius that I know of, these flowers will not produce
berries. Or will they? Or should I go and cut some sprigs off a male
holly and wave them over the flowers? Obviously, I'd love some berries!

Excuse my astonishing ignorance. All advice much appreciated.

Dave