>"Good morning"
>Observe what is she doing.
>"Where might the shrine maiden be?"
>You decide to go with a decent manner of speech
>She's rummaging through Reimu's stuff. She seems to be looking for something.
>"Good morning to you too! What's the problem? You don't come here very often, do ya?"
>You ask her where Reimu is.
>"Oh, you're looking for Reimu? Well that's a first!"
>"I think she's gone to the Human Village, to get some alcohol for the party"
>"Oh, also, can you ask Remilia if she wants to come, too? Don't ask the librarian though, she's a loud drunk!"