I was extending the offer to the person I was replying to. As they were taking heat from several different people, which can be a stressful situation, they rather reasonably decided to stop replying.

In the event that he had something he wished to say to me, but did not want to come back to the thread, I extended an invitation to pm me, if he wished.

That's all. I don't personally need to pm, but thought I'd be polite.