Buy a bottle of moisturizer
购买保湿液

Excuse me, my skin is always dry, can you give me some advice?
请问，我的皮肤总是很干，能给我点建议吗？
I think you should buy a bottle of moisturizer.
我觉得您应该买瓶保湿液。

Will that work?
那样管用吗？
Yes. It will keep your face from getting dry and make your skin soft.
管用，保湿液能防止您的皮肤变干，使皮肤柔嫩。