What does it mean when he tells you his femalecoworker had a conversation with him?

So i have a boyfriend we have been dating for 6 months now and i am not a jealousy person or get pissed off easily if i knew he is talking to girls for specific reasons. But the other day we were talking and he told me that a girl who works next to his office came by said hi and talked about general things. I am fine with that but then he asked is that considered as cheating?

Is that a good or bad sign?

What does it mean when he tells you his femalecoworker had a conversation with him?
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