I was interrupted before I said the punch line and I got annoyed.
That was the outcome, huh?
His speech didn't have much of a conclusion.
When you're talking or writing a paper, the part that falls at the end is the conclusion.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading already so you should be able to read it!