Science is the most reliable, there is nothing better, see:
Believe in science & ethics
If you ask a million people, they will tell you that they have
dreams and you can consider the fact that you yourself have dreams.
You can also observe people while they sleep and after observing
many people, you will be able to relate their physical state to the
time when they are dreaming. This, you can observe in every normal
person.
You can take it that there is proof that "we have dreams".
You mean you live in a world where you believe anything you want
even when there is no proof for it. Sorry I am not so stupid as to
live in your world.
Sorry, you need to show me concrete proof first, I am not like
you, believing things without any proof. 
Since you believe in things without proof, why don't you give me
your money then? You will triple whatever you give me in three
months. In order for me to work my magic, I will not accept
anything less than 6 rational figures in US dollars.
Prove to me that you won't and if you cannot, then you are stupid
not to give me your money. Give me your money because you will
never be able to prove that you won't and according to you, that is
the way to live life. 