Dairy is a grey area. While many people are affected by it, others can have dairy products and still get results.
If you like dairy products such as milk, yogurt, and cheese, you will just have to try eating them for yourself. If you eat dairy products and are still seeing results then there is no need to cut those products out. If you aren't getting the results you are looking for, cut out the dairy for a few weeks and see if that was what was affecting your weight loss goals.
Make sure that if you do choose dairy products that you stick with the full-fat varieties and avoid any fat-free or reduced fat variants. With products like yogurt, you will want to avoid any with added sugars. Yogurts with mixed fruits are alright to have in moderation.