Is it good to mix your shampoo and conditioners?

okay so sometimes if i run out i would use my herbal essences shampoo and use like a pantene conditioner or my new conditioner i got.is it bad for my hair or does it not make a difference? my hair is really important to me and its one of my better qualities so i wanna maintain my nice hair!! haha not to be conceited or anything.... but you get the point. thanks!