It is interesting to see how each person places value on time. One person feels that accountability is important when it comes to stated availability and another may see it as merely a guideline. This person over here believes their time is the most valuable and charge a fortune for your services where as that person over there believes your time is nothing and will make you sit and wait all day on them.
Personally, I think everyone should just treat each other with a respect that they would expect to get themselves and the world would be a much happier place.
Time is an illusion created by man and we have somehow tried to but a value on it with out a benchmark to work from.
Have a great day!