Audacity noise removal is an awesome thing (although a bit time consuming and not 100% effective).
Here’s the original clip with the center channel isolated. Both music and dialogue are present.
https://www.youtube.com/watch?v=y1P5X4WRvDo
I want to reverse the order of those two lines, but how to do it with the music present? Audacity noise removal! Here’s the new audio with music stripped out.
https://www.youtube.com/watch?v=bYk7nvks64M
And the final clip, with the original music back in.