I can't help wondering what the problem with just cutting together the different 'segments' would be. If the conversation halts, and you're all "um errr what next? *mumble*", just cut that out and make it sound like the conversation around the first topic ended and the next one started. To the listener it should just sound like you decided to talk about something else now; there's no need to have distinct sections, especially since there's no way to jump directly to them etc. Having segments or sections or whatever is a completely arbitrary thing in a continuous sound file.
EDITED: 10 Jul 2012 17:03 by CAER