I saw rather amusing remarks from colleagues when replying to the HR for the exact same memo concerning their lateness to office.
Reply from a female colleague:-
1. I was late from [date] and [date] due to the major road works nearby my house which caused terrible traffic jam.
2. I was late on [date] because I took a wrong turning into an unfamiliar route when I was frustrated because I was stuck in a jam for over 45 minutes.
3. I was late on [date] because I woke up late as I was feeling a little unwell the night before.
Reply from a male colleague:-