Which shampoo one to use?

I went to my friends house and his mom asked me for help with what shampoo and conditioner to use for her foster kids hair, one has curly hair, the other has straight hair. She says that when she used the shampoo she had it looked to greasy but then when she didn't use it, it looked dry. She is trying to figure what shampoo to use but i don't have the answer. Anyone can help me with this? O BTW their moms are white/Indian, and the other the father is black to that sort, if that helps.Which shampoo one to use?
I don't know if this will help but here goes, here are some kids shampoos that don't give split ends or rummpled dry hair:





Loreal


Johnson shampoo like the baby shampoo... it's really gentle





Suave... It smells good, but it's cheap... (not expensive price)





Maybe Pantene( It's kinda storng , well depends on the hair, if ur hair is sensitive with split ends hair then i don't think it'll work out.





But i prefer Loreal and johnson .... Loreal makes ur hair smell good...and it's easy to rid out of grease.


Johnson is easy becuase it's for babies but kids can use it because it doesn't go in ur eyes, lol another hand it gentle to babies but for kids it can work fine...


Johnson doesn't make hair dry or greasy