Gray dwarf hamster with white chest

I lost my gray dwarf hamster yesterday around 3pm near the coffee shop by Parkdale Mall on Dowlen Road in Beaumont. He’s the size of a ping-pong ball, gray with a white belly and a tiny white heart-shaped patch on his chest. He also has a small notch on his left ear and a white-tipped tail. He was in a blue plastic travel cage with a yellow wheel, so if he wandered, he could be under benches or in planters around that area. This little guy means a lot to my daughter, and we’d be grateful to get him back.