请帮我译中译英，谢谢！

I know that you will have a meeting all day on September 12th,but I still want to reconfirm with you if you can join this phone meeting.

as i know,you will have a meetig the whole day of 12th september,however,i would like to conform with you whether you can attend this conference call

I know you are there all day September 12 meeting, but would also like to confirm with you whether you can participate in the conference call.

I know you are all on September 12th conference, but still want to reconfirm with you if you can attend this conference call.