Swamped

You notice their glass - it's barely touched. It reminds you of the cheap paper used to write the note you found.

If you spilled the drink - or had one of your own to spill - you might be able to see if they had any of the paper.

But you don't really have the sleight of hand to do that without making it obvious it's deliberate. Of course, it would be a simple matter with magic, but you still don't entirely understand what happened the last time you tried a spell. You're not going to risk it to move a glass.

Wait a moment, though. The glass is on the table. That should be easy to pass off as a careless accident.

"Well, I suppose we'll see what they ended up doing soon enough," you reply. You turn around, bumping the table as you do, enough to shake it a little.

"Oops! Sorry, that was careless of me." You turn around again - yes, there's a small spill on the table.

"No matter," the "old woman" replies. "Didn't spill that much and it's not like I was that thirsty anyhow."

They pull out something. It's that low-quality paper.

But there's something a little odd about it compared to the sheet the note was on.