Harry Potter Fanfic

"I'm Atarah,"
No response.
"Hi, I'm..." I encouraged him.
Again, no repsonse.
I sighed. I looked at his suitcase. It had two letters sewed into it. D.M.
"Well, I'll just have to call you D.M., won't I?" I smiled.
He sighed in frustration.
What do you do?