While in many instances one may tend to overlook the same, yet in many instances one needs to sit back and analyse, what is ccoking up? In squarely dealing with such instances it is better to focus on that single incident and don't bring other instances. Be ready to patiently listen and never never adopt an accusatory tone. This will save the situation and the embarassment is avoided. Highlight the problems that have resulted from the lapse, that may help in many instances.
This is a delicate matter and it is better to be prepared. So plan the conversation well, discount the probabilities and keep it stright and simple. End the conversation with a light handshake. Best result come if both the parties end up feeling better. KK Nair