We dont have 'assigned' guardian angels! Thats hollywood/storytime silliness. God/Christ are our protectors. They dont need help. There arent nearly enough angels for everyone to have their own and angels arent all powerful and all seeing like God. Nor does every angel in heaven haveva silly human style name. They are heavenly beings not human mascots. God may occasiinally make use of an angel to interact directly with us but God is the only true protector we have or need.