Harold was about to go right into another spiel on AI and robotics with Thisa, but when she pointed out the fact she was going to be late, he took out his phone as well, and looked at the time. Remembering he had his own class to get to as well, he gave a slight grin and waved without his pinkey or ring fingers. Apperently another unique trait to Harold. He walked over to Tim after watching Thisa walk away for a moment, and spoke once more: 

"Ah Tim, it would appear we will be late to our classes if we procrastinate any longer. May we hold off on that tour until we have completed our school day perhaps?" Harold went on hoping to get more from his new acquaintence. "Ah, do you know where I might find...." Harold started asking for directions, quickly moving back to his original conversation with Tim once more.