If I finish the food odering. I would say "谢谢!就这些!xie xie! jiu zhe xie!" Thanks, that's it!
If I want to keep the menue and order some another food later but at that moment I hope the waitress fisrtly confirm the food I've ordered. I would say"嗯,先这样,我再看看。en, xian zhe yang, wo zai kan kan" En~now these is ok, let me have a look (Then I will tell you later)