I'm glad to hear that you think I'm speaking correctly! If you'd pke to express that you agree with what I've said, you can say something pke:

I agree with you.
I think you're right.
That makes sense.
You've got a point there.
I see what you mean.

You can also use phrases pke "I agree with what you're saying" or "I see where you're coming from" to show that you understand and support the ideas being expressed.