Part of customer service is convenience and adapting to the customers needs. But when the service is dive instruction part of the service is teaching people to take on the responsabilities of a diver. My students are expected to pick up and drop off equipment at the prearranged time. Once in a while for the right reason and with enough notice we make special arrangements for people. But you see I want the student to take the responsability of making sure all their equipment is there and squared away for the dive. Why? Because thats what divers must do. Just because they had things come up does not mean that our agreement has changed. The prearranged schedule must be changed by mutual agreement or it don't count. I can hold their hands and make everything easy for them but I won't always be there, will I? The fact is lagistics is one of the more important issued in diving. Every class I have at least one student tell me on Sunday (when they are done diving) that they will not be able to clean the equipment and return it on Monday and ask me to do it. My response is that, for the daily rental fee, they may keep it as long as they like. As long as everyone knows what is expected, the one who defaults is the one responsible.The reason for the default doesn't matter. If a person is too sick, too tierd, too far away or whatever to do what they agreed to do the resonsability is theirs.