prośba o spr. e-maila

Temat przeniesiony do archwium.
Unfortunately, you had to miss an important meeting yesterday. Write an email to the organizer:
apologize
explain why you could not attend (invent a reason)
ask for a copy of the meeting minutes

Dear Mr John Smith,
I am writing to apologise to you for my absence the conference yesterday.
Unfortunately, I could not to be on the meeting, due to personal reasons.
I heard that the conferrence had come off.
Could you send me a copy of the meeting minutes?
Please accept my apology once again.
Yours sincerely,
fhgkjgklfg
Sprobuj poprawic/uzupelnic przyimki np. przed conference i meeting. Co mamy rozumiec przez come off?
could not to be ?...dlaczego 'to' ?