I love how disinterested Sayaka is. She's probably heard it all a thousand times lol.
I was about to say that there probably isn't a lot of company where they are so they'd probably run put of conversation topics. However, the third movie basically implies that every magic girl that has been saved from becoming a witch is with madoka now, which in my headcanon means that she specifcally seeks Sayaka out amongst hundreds of thousands of girls to tell her this story for the millionth time. You know, just to fuck with her.