I HAVE A MENTAL NOTE - TO BE SPECIFIC

I'm just disappointed that my efforts are put into waste - it was exhausting to prepare and think and only to find out that NO ONE is available. It was so, so funny that "I forgot" was used as the nth time for an excuse.
Can you think of anything else, please?
No I'm not MAD nor ANGRY but I'm human who can also be acceptable that I'm feeling this way.

Well, I'm still happy that my bestfriend is always to the rescue.