工作英语对话:Giving an Excuse for Being Late to Work(2)

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: OK, it won't happen again.
B: All right, please take this message and call this client.
A: OK, 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.