Apologize Letter.

Hi, Marta,

You told me yesterday if I could go to your theater rehearsal next day. I’m really sorry, but I didn’t remember about my own practice with my band. I’ve promisse to them that I didn’t be late on friday.

I can usualy cancel my music band practice if I want, but this friday it’s different: We have a concert soon and i can miss to any practice for the moment.
I didn’t remember this important date with them, so i said to you that i could…

I’m very sorry, and i hope that you will do your performance as well as can be possible. Maybe we can meet saturday morning, don’t you?

See you, and i hope you can meet next saturday…
Take care, Víctor.