Recently got a new iPhone 5S, and Siri usually always works fine, but this morning, when I arrived to school, I tried to use Siri, and noticed it was slow, and thengot a message that said, "I'm really sory about this, but I can't take any requests right now. Please try agian in a little while." It worked later in the day, and again at the same place where it didn't work earlier. So is this normal? And why did it happen?