here are many ways to say goodnight in a classy way. Some examples include:
- Bonne nuit (French for "good night")
- Sweet dreams
- Sleep well
- Have a restful night
- Safe journey into dreams
- May your sleep be peaceful and restful
- May the stars watch over you
- Rest your head on your pillow with ease
- May your sleep be deep and restful
- Sweet dreams and pleasant thoughts
- Goodnight and may the night be kind to you
- Wishing you a peaceful and restful night's sleep
As you can see, there are many different ways to express the idea of wishing someone a good night's sleep, and the choice of which phrase to use will depend on your personal style and the person you are speaking to.