What shampoo/conditioner do you recommend??

So I have long thick wavy hair which is healthy but between traveling a lot this summer having to switch up to travel size random shampoos and conditioners its just done no good on my hair. The only problem I’m having right now is a dry scalp and I’m looking for good shampoo and conditioners that can help clear that up. Preferably ones I can find at Walmart, cvs, or whatever and not have to buy online. Thank you!