They are called anashim in chapter 18, however chapter 19 from the get-go makes it clear that these anashim are malachim. This is inarguable.
I asked for strength, and G-d gave difficulties to make me strong. I asked for wisdom, and G-d gave me problems to solve. I asked for prosperity, and G-d gave me brawn and brain to work. I asked for courage, and G-d gave me dangers to overcome. I asked for love, and G-d gave me troubled people to help. I asked for favors, and G-d gave me opportunities. I received nothing I wanted. I received everything I needed. My prayers were answered.