Wiktionary
change someone's mind
vb. (context idiomatic English) To convince someone to make a decision differing from what a previous one.
Usage examples of "change someone's mind".
I thought about going back to see that old black mama and asking her to take it off, but I knew somehow she wouldn't - she'd made up her mind it was best for me, what she was doing, and one thing I've learned as I've made my way through this world, Delores, is that the only time you can never change someone's mind is when they've got it in their head that they're doing you a help.