The problem here is context. I can’t imagine an algo that would get it correct 100% of the time on the first run. An actual assistant would learn from and adapt to you. Making a mistake is ok but you can’t repeat the mistake over and over. If you meant London, UK you should be able to say: “No Siri, I meant London, UK.” And that would be the last time Siri is wrong here. Sadly, this is not the current state of AI.