Good news! If you said nothing, then you have nothing to worry about! At least, for those games.
However, it's important to note that those pop-ups are not displayed based on a single game's reports. They occur when there is a "spike" in reported games against your account. As an example:
Every player is reported sometimes. The average player receives reports in 3-5% of their games. Assuming that Player A is on the low-side of average, he gets reports in about 3 games of every hundred. If, over some particular week, he gets reported a lot - say about 10% of his games, one of those reported games will trigger a pop-up for him, based on the sudden increase in reports against him. Additionally, those pop-ups have a delay of some unknown time between when they're triggered and when they display.
So, while it's genuinely doubtful that you have anything to worry about regarding those two games, it's also doubtful that those games were the ones that triggered the pop-up.