As this story developed it reminded me of the 1995 movie "Before Sunrise" with Ethan Hawke and Julie Delpy, where they meet on a train and end up spending the night in Vienna getting to know each other before he has to fly back to the States.
In this movie Max is in Italy for some sort of work-related gathering and he is at the bar one evening, alone, when Maria sits next to him and they make small talk. She wanted to see Venice and wondered if he would accompany her, just as friends. On the short train ride to Venice they even made up a few rules, like no holding hands and no kissing.
It turns out Max is fresh from a breakup that he is trying to mend, with no success. She has recently lost a family member and her desire to tour Venice is related to that.
So, much like "Before Sunrise" this story is mostly about Max and Maria getting to know each other. Which in itself is interesting, but neither exciting nor novel. However the great scenery adds a nice dimension to this movie and makes it worthwhile.
At home, streaming on Prime.