What to say when quitting a job?

Hey guys! So I’m handing in my two week notice to my current boss today. I got offered a job at the same company my sister works at for more money, more hours, and I’m a better work environment for me (office instead of retail). I am extremely nervous about doing so. I’ve worked out that the best time to hand it in will be the end of my shift because duh, and also there won’t be too many other co-workers around at that time of day. However, I have no idea what to actually say to him when I hand it in. Help!