How To Get Black People Hair Like White People Hair?

Suggest you go to a professional cosmetologist who has experience in chemical hair relaxing.
  Some hair relaxers are very strong and must be applied properly as well as retouches when the new growth of hair starts to grow out.
  If the stylist has no experience in relaxing hair, they could totally destroy your hair.
Suggest you find someone who has their hair relaxed and ask them who does their hair and for how long they have been getting it relaxed.
Make sure they have been having relaxers done from the same person for at least 8 to 12 months and their hair is still in good condition.

Truthfully i think thts impossible.

LOL, that is impossible under a microscope Caucasian people hair is round and black people have flat hair.  Believe it or not it also depends on your location the closer you are to the equator the more you hair will be kinky (black hair) the people you are away from the equator the more it will be straight (Caucasian).  Which really has to do with your early generations and were they derived from.  Some african americans have straight hair and some do not it is caused by different genes mixing and matching (ex:interracial children).  Some white people have bad hair so you should never want your hair to be like white or black obviously you have your hair for a reason.  As far as a straightener use a relaxer and make sure you maintain healthy hair by keeping it washed and trimmed (split ends).

I think people should go to a white people hair salon and get it done there. ( no offense. Honestly)

All you have to do is get a Japanese perm I heard it makes your hair like white peoples hair.