I'm not sure why the thread was posted in the first place, there was no "incident". It was a civil conversation between two rational people with a positive outcome.
That civil conversation is an incident:
in·ci·dent
noun
noun: incident; plural noun: incidents
1.
an event or occurrence.
"several amusing incidents"
synonyms: | event, occurrence, episode, experience, happening, occasion, proceeding, eventuality, affair, business; |