He said he would be glad to let her give the two thousand dollars to Mister Wilkinson, so that she could be happy.

VOA: special.2010.04.24

I'm glad is a pattern that you want to use in a sentence to describe when you're feeling happy.

当你感觉高兴的时候，你可以用“I'm glad”句型来形容你的感受。

I'm glad 课堂 - SpeakingMax英语口语达人