Yellow cockatiel with orange cheeks

I'm Priya Patel, and I've misplaced my yellow cockatiel, Sunny. He's a lively little bird with a bright yellow body, gray wings, and orange cheek patches. He wears a green leg band with the code C38, and a small blue tail feather sticks out when he's excited. I last saw him yesterday around 3pm near the Coffee Corner on Market Street in downtown Aberdeen, in Northeast SD. Sunny means the world to me; he's been part of the family for three years, and I'm really hoping to get him back.