It looks like this flow is:
- User clicks on the phrase to see options
- User is presented with options that have a difference in tone
- User clicks on an option to select it, and then clicks OK to apply it
- The selected option replaces the original phrase
I think you don't need the OK button to confirm the option selection. The selection should trigger the dialog closure. It would be good to give the user a way to cancel and close the dialog if they don't want to select a choice. An "X" close icon could work.
If the suggested phrases get longer than a couple of words, that might get hard to read; you might want to stack phrases vertically.