Dear Coaches of Sunday (my morning) or in general why not, can you please try your best to make an announcement when you are unable to take the coaching please?
There are many peoples (like me) that sometime don't take any business on or simple make an alarm on Sunday morning to wake-up early to follow your lessons when they/me can sleep some extra hours (specially on Sunday with all the major tournaments go for the early hours of the next morning)
Please, it is very annoying and heavily upsetting look for something and be put off like that without any warning or so!
Thank you for your understating and cooperation
All the best
Kiro