Practice, practice, practice. During your practice, notice which phrases consistently trip you up and change the syntax/verbiage of that phrase to something that you’re more comfortable with. I’ve given 3 speeches like this at wedding. Once, one of my stutter words was actually the name of the bride-to-be. I noticed that if I started a sentence with her name “Ashley”, I would have to close my eyes and force it out. But I noticed that if I added the word “with” in front of it, it made me able to kind of combine those words, know that I would be able to articulate it. It also set up jokes in a decent way: “With Ashley, we always knew Jim had outkicked his coverage”. While a little awkward at times, the word “with” has saved me quite a few times. Good luck!