Hi, I'm Dobby the house elf. You can't go back to school and your friends don't write to you anyway.
My friends haven't written to me.
Please don't! Hogwarts is my home and I'll get in trouble
Unless you agree to quit Hogwarts, I'll pour this cake on your visitor's wife
You're never going back!
Ahhhhhhhhhhhhh!
Harry Potter found a house elf in his bedroom called Dobby. Harry's friends hadn't written to him and Dobby knew!
Turns out that Dobby hid the letters because he doesn't want Harry to go to Hogwarts. Harry chased him and Dobby threatened to pour cake on the visitor's wife's head.
Dobby did it anyway and the lady was covered in cake! Uncle Vermon was really mad and locked Harry into his bedroom so he couldn't leave.