I read this before on my phone and was just coming back to say the same thing as Mylitta!

I guess it would help if i had a calendar or diary that I used well, then I could give an answer at the time.

I wonder if people are becoming more cavalier about their responses as well, saying yes to make sure they are catered for etc but changing their mind at the last minute? I have had this happen to me a few times and it drives me mad.