Small golden hamster with heart-shaped chest patch

I lost my small golden hamster yesterday around 3pm near Windmill Island Gardens in Holland. Its fur is warm golden-brown with a white chest and a tiny white patch on its left ear. It was in a blue plastic exercise wheel inside a clear plastic cage with pine bedding, and the door was left ajar when I was cleaning. This little guy is a gift from my sister overseas and has sentimental value; I’d really love to have him back, especially because of his heart-shaped chest patch and slightly bent left ear.