Cockatiel named Sunny, yellow crest, gray body

I lost my cockatiel Sunny yesterday around 3pm after I stepped out to take a quick call near the Mall of New Hampshire on South Willow Street in Manchester. Sunny is a gray cockatiel with a bright yellow crest and orange cheek patches, about the size of a pop can. He has a blue leg band with the letters "NH" and, when outdoors, I often put a light blue harness on him with a tiny bell. He’s very tame and responds to his name; I’m worried sick and miss him a lot—he’s part of the family and the house feels quiet without his chirps.