Every Wednesday, the cleaning lady comes to clean the hallways of the apartment building and is always looking to strike up long conversations with every single tenant who passes across her.
She speaks in a different dialect than me, so I can't make sense of what she says, but it's clear she's humble, modest, and nice.
While it's sometimes okay for me to talk with her, other times I can't afford to miss the train/bus/metro and arrive late at work.
How to avoid ending up in a conversation with her without making an idiot out of myself?