So, as a visitor in France, to really get along and fit in, when you interact with another human being, say Bonjour before asking anything ( very, very important!!).
Bonjour is not just about saying hello, it is much more, a sign of respect. Knowing this will often give you better service when entering a shop or a bakery or otherwise you will just be perceived as a bad-mannered person. I cannot overstate this to tourists.
As a shop owner told me 'If you come to me with just a request, I am clearly going to think you see me as a robot that is just here to satisfy your needs and not as a human being that deserves a little respect'
If you can just learn this, your time in France can be so much more lovely.