Intelligent Strategy
It’s possible that some people find it challenging to start a conversation, while for others, talking to strangers is second nature. You can always search for things of common interest or ground to talk about with a stranger, even among a long list of topics to talk about with a stranger.
If that doesn’t work, you can always do what everyone else does, which is to talk about the weather, and from there the conversation will take on a life of its own. Show them something interesting on your phone, as this man did; that is another option available to you.