Shampoo and Conditioner?

I am from Ethiopia(Africa).I used to have a beautiful hair before i came to USA.But after a while my hair becomes so dry even dry that makes it difficult for me to comb it.I used different kind of Shampoo and Conditioner believing that it will give me a solution but nothing was changed.Finlay when i talked with a professional she told me that it is because of the water change.And she was right.Most Ethiopians have the same problem like me.but still i could not find the best Shampoo and conditioner.I Finlay use a relaxer and it kind of makes it easier for me but still i need help before i loss my hair.I am scared that if my hair continues like that i will be in danger so soon. so please help me by recommending the best shampoo and conditioner with a clear reason. I also want to color my hair.Currently my hair color is dark brown and i want to change it into light brown.Shampoo and Conditioner?
Use the moisturizing shampoo and conditioner from Redken.Shampoo and Conditioner?
colouring now is bad !! u will just Bering ur hair by colouring and u dont need that now!4 ur hair well thers a easy why that i learned from my Gram its using olive oil !!! i know it seems silly but try it on ur hair ofcors dry hair with no water okay!! put olive oil all over ur hair specially on the roots ends also ,,then wash it with shampoo 2 or 3 and wash it really good coz u dont wont it 2 smell like olive or 2 feel that somthing sticky on ur hair so wash it really gd and after ur really c a big change even it well add sparkle 4 ur hair and do it again after a month if u felt that ur hair needs more gdluck :D