Chances for what? I’m afraid I don’t even start a conversation with someone who is boring, irrelevant, stupid or a jackass. I only start conversations with people who have impressed me in one way or another. Usually because they have a talent for astute observations and analysis.
If someone approaches me… well, usually it’s not for anything other than some kind of information or opinion. Very rarely is it personal. But If it’s someone who approaches me and they seem to want it to be personal, I usually do respond to see if it is really me they are interested in. But in 99% of the cases, it’s me approaching people, and I only do that if a person has impressed me. I’m not often wrong about them, although I have made a couple of mistakes recently.