Is it a hint that she is interested? What do you think?

A woman in her 40s (i'm 28) that i encountered in parking lot started talking to me about weather out of blue. I'm socially awkward so i never get hints and i'm terrible at small talk. I just nodded and agreed to everything she said.

Considering that women are avoidant of men in general, is it a hint that a woman initiates conversation with you without a need?

Also, how often do you guys get into eye contact with women you see outside?