When you're trying to say you understand or agree, there are a bunch of ways to do it. You could go with the classic "Okay", which is short and sweet. Or maybe "Sounds Good" feels more fitting depending on the situation. If you more info want to sound super chill, just throw out a "Yeah" and be done with it.

• Sounds Good - This is your go-to phrase when you agree with something or understand what's being said.
• Sure Thing - A little more emphatic than "Alright," this shows that you're paying attention and ready to roll.
• Cool - Perfect for when something sounds appealing or like a good plan.