That seems like the smartest idea. Even if she doesn't answer, someone else might have seen her last. We have to get to her before that other AI does. Who knows what will happen to her.

[ Even without her powers, Mami thinks she can protect people. Ai isn't Kyouko, or Sayaka or Madoka, but she's still someone she thinks she had to help. ]

We may have time, but we don't know if she does.