Witnessed: Catcalled by Ojek Driver

I witnessed a young woman catcalled by an old man who seems to be a motorcycle driver (ojek). The old man first whistled to the woman and then said, “Hai neng, sendirian aja nih… Abang temenin mau?” At that time, I was about trying to intervene but the woman seems to ignore the comment and walk away. And the old man didn’t do any further action which may harm the woman.