So it seems to be one time unpleasant conversation. I'd hardly call that harassment.
If one time unpleasant conversation with persistent person is harassment, then I was once police-harassed. This officer wanted me to go to police academy. I said no but he didn't stop. He was quite drunk. And last weekend I was oil-change-harassed, my dad kept insisting that I'd do an oil change to my car this summer. He was drunk too.
But I have to admit that this kind of behavior towards women should stop. What is causing it? Let's go after the source, not just try to heal the symptoms.