How to gently remind the upstairs to be quiet?

Euphemistically remind the upstairs to be quiet, which can be one of the following.

1. Hello friends upstairs. I want to remind you in a friendly way that your activity may be louder, which has affected our downstairs. I hope you can pay a little attention and turn down the volume. Thank you very much for your understanding and cooperation.

2. Hello, neighbor upstairs. I know you probably didn't mean to, but it's a little loud. If possible, can you try to reduce some noise? We will appreciate your thoughtfulness downstairs.