The definition of demanding - Leaving a message on someone's phone at 5pm (when they finish at 4pm) asking for a change of location for 3 different classes, scheduled over busy periods, for the whole of next semester AND THEN leaving a messsage on their phone at 9am the next day (when they start at 8am) to "check up on how they're coming along with the changes"
WTF lady! I have a) more important and b) more urgent bookings to deal with. Get in line.
Welcome to my working life. What a wonderful job I have lol.