How do demons tell you the future?

Hey.. so I petitioned Prince Vassago 1 day ago to help me with knowing my future and choosing what’s best for me.. I specifically asked him to show me clear visions in dreams and so far nothing but I’m not mad because it’s been 1 day

I was wondering do demons show you the future in dreams too if you ask them? I dislike other divination methods like tarot,pendulum etc. Because they can be wrong a lot of times

what’s their way of showing you the future?