There was something I watched a few months back with a UK
pua called I am the future. If he saw a girl that was losing interest he'd hook her back into the convo by saying "You know, you kinda remind me of a powerpuff girl!" It's such a bizarre statement and neg that the girl can't help but laugh and continue the conversation herself through curiosity.
I've tried it a few times and it's always worked with me, though I haven't used it often. Give it a go anyways. Let us know how you get on.