Pereira has spent the past year on-loan with Fla, though an agreement over a permanent deal has so far failed to be reached.
The midfielder is also being linked with Fulham.
But he told Brazilian journalist Raisa Simplicio: "I am not the one who decides, it is up to Man United. I would like to stay in Flamengo, but it is not in my hands.
"I'll see what's best for me and the club. I love Flamengo. We will talk soon and make a decision."