Sorry, I overslept. I forgot to set the alarm clock.

抱歉我睡过头了，我忘记设闹钟了。

youdao

I forgot to set my alarm and I overslept.

我忘了上闹钟，所以睡过了头。

《柯林斯英汉双解大词典》

Rosie: Sorry, I overslept.

罗茜：对不起，我睡过头了。

youdao

Another memory from the 1977 mayoral race had the candidate and me pacing the hall outside a Midtown hotel suite where Vice President Walter Mondale, who was scheduled to campaign with Mr. Koch, had apparently overslept, or decided to sleep in. (I'd been summoned to take the Vice President's luggage back to the airport and Air Force Two.) Whatever it was, Koch took the mix-up stoically.

WSJ: Ed Koch: A Mayor and His City