A: I am sorry I am so late to work. B: What was the problem? A: I lost track of time. B: Things happen; make sure it doesn't become a habit. A: It won't happen again. B: All right, please take this message and call this client. A: No problem. B: Now does everyone understand the diagram on the board? A: Yes, I understand the numbers. B: I will explain it again; especially for those of you who arrived late.