Do Dungeon Masters keep office hours?

Teacher: well why don't we set up a time to meet next week? do you have my cell number?
Student: no, I don't have my cell phone with me either, I'll write your number down on the most important thing I have! (pulls out sheet of paper)
Teacher: oh is that your class tracking sheet?
Student: No! ITS MY DUNGEONS AND DRAGONS CHARACTER SHEET! which reminds me...i cant meet with you tomorrow.