Sybil Trelawney: 16 years I've lived and taught here! Hogwarts is my home! You can't do this!

Dolores Umbridge: Actually, I can. [to McGonagall] Something you'd like to say, dear?

Minerva McGonagall: Oh, there are several things I would like to say!

Albus Dumbledore: Professor McGonagall, might I ask you to escort Sybil back inside?

Minerva McGonagall: [to Trelawney] Sybil, dear, this way.

Sybil Trelawney: Oh, thank you! Thank you!

Dolores Umbridge: Dumbledore, may I remind you that under the terms of Educational Decree 23, as enacted by the Minister...

Albus Dumbledore: You have the right to dismiss my teachers. You do not, however, have the authority to banish them from the grounds. That power remains with the headmaster.

Dolores Umbridge: For now.