You can use simple English and communicate about the late coming of employee. You can try. Just refer the following to understand
" Dear Sir
Mr._____(employee name) informed me that he will come late to office today due to _______ (reason for late) which is approved by _______(refer sanctioning authority name). Also please note that Mr.____ (employee name) informed about his late coming to office prior to his or her commencement of shift hours.
2nd July 2019 From India, Madras