I'm going to cancel plans with my friends on a moments notice
Why do you have to ghost your friends like that?
I been very busy and I simply can't make up my mind right now.
I'm sorry your schedule is so hectic, but you did good in telling them however late it is. It's bad for them though, they might have been looking forward to it and you need to be more careful next time so you don't keep disappointing them over and over again.
I won't do it again and I'm not that kind of person, I accidentally did it on my phone.
Living a busy lifestyle can definitely be very hectic like I was saying. But you should really put time aside to let people know you will not make it to an event you had planned. Doing this will lessen the blow they will take when they find out you can't make it.