One last wish

The black hoodie

What if the girl I saw in the black hoodie earlier was Anna? What if my sister is still alive? I pulled out my diary, which was prominently in my bag. I got out a pen and started writing..
Dear Anna,
I'm not entirely sure why you wrote to me and what you were trying to say. If it's true you are there, then prove it to me. Let me see you and I'll believe you.
Jessica Gleem.
It was short, but it was the best I could do. For all I know it could be a complete wind up by some stupid year 11 guy and he paid poor desperate Flora to get in on it. I slid the paper into my grey bag and sat back in the chair, my head full of worries.
"Sorry never got your text. What's up?" Mia asked, her face concerned.
"I wanted to show you something", I replied.
"Go on then", she paused, "show it me".
I passed her the letter and her face went white, despite the fact she had just been smothering a foundation two shades too dark all over her face.
"You don't think it's a", she stopped and her hands started to shake making the letter move, "a, a ghost".
I shook my head and took the letter from her hand and stared at the letter text for a while.
"I just don't get it. Why would she send me a letter. Mia I seriously think this is real", I shook the letter in my hand as I spoke, "what if she's trying to give me a clue or a warning about something".
"Have you wrote back?"
I looked down at my bag. "No. No, not yet."
I hated lying to her and this all seemed so secretive, after all we always told each other everything. All our secrets, gossip and so on. But this was different. Of course it was.
"I best be going I've got biology next," I said.
"Ok, bye. Meet you at the lockers at 3:00?" Mia shouted back.
I didn't reply, and kept my head down. I couldn't say anything to her after I had lied to her face. I ran up to Flora's locker and wrote a note on the letter to "Anna".
To Flora,
I'm not awfully sure if this is true, but if in the slightest chance it is please give this to Anna. If it's wind up, you won't want to have been part of it.
Thanks Jess.
I put the letter in the whole at the top and walked to my next class. I strolled past the line of black and red frames and stopped in line in front of Anna's picture. I listened in at the wall, my ear pressed right up at the side. There was no sign of movement or life apart from the odd pipe burst (this happens at school often and they never fix it). I knocked quietly on the wall so nobody walking past would suspect anything.
"Hello," I whispered. "Is there anyone there".
No reply. I grabbed my bag and walked off. The black hoodie. That's it.