Cream-colored dwarf hamster with white belly

I lost my cream-colored dwarf hamster yesterday around 3pm near the Starbucks on Chapel Street by the New Haven Green. He's tiny, about the size of a grape, with a pale gray stripe along his back and a white belly, plus a tiny black birthmark on his left hind paw and a faint patch behind his right ear. He was in a small pink carrier with a blue lattice handle, and I had him tucked in while I biked home from a friend's place on York Street. I'm really worried—he's shy and could slip into a crack or vent in seconds if I'm not careful. If you've seen him, please text me; this little guy means a lot to me and I'd be incredibly grateful to have him back.