Sketch title/author?

Hello,

I heard a sketch on the radio and I would like to find it. However, I don't know the title or the comedian...

It's a sketch where a girl explains relativism to her father in a letter while she has just failed her high school diploma (she tells a lot of misfortunes in her letter, the father breaks down while reading it, and in the end, she says it's not true and that she actually failed her diploma).

I hope I was clear enough, thank you to those who will reply.