Deputies with the Greenville County Sheriff’s Office are asking for help finding a missing man with dementia. The missing man is 83-year-old John Bostic Jr.He was last seen about 10:30 a.m. Monday in the parking lot of a BI-LO grocery store on E. North Street. Authorities said he was in a metallic blue/gray Honda CR-V with South Carolina tag QEE-996.Bostic was last seen wearing khaki