Changing meeting times

— Hello, Lawrence? This is Carolyn. I've run into a problem with the schedule tomorrow. Our 10 o'clock presenter, Dr. Fitzsimmons, is stuck at the St. Louis airport. The soonest flight he can catch won't get him here until 10:30.
— All right. He'll need to rest and eat. Why don't we switch his morning session for one of the 2 o'clock sessions?
— That's a good idea. I'll check with our 2 o'clock presenters and see if one of them will change.
— Let me know as soon as you've arranged it. I'll get a sign posted at the registration table.