Luna,

I know you are probably very surprised that I'm sending you an owl. Don't say anything to Ginny, she'll kill me. I owe her one....But I was wondering if perhaps, you would like to go to dinner tomorrow night. It's a very nice muggle Italian Restaurant. Just send me an owl back, letting my know if you are interested. You don't have to of course, it just seemed as though we had a connection good time. 

Ron