It’s really hardly worth trying I’m afraid. For example if the recordings were stereo and in one recording the voice was mostly in the left and in the other recording the voice was mostly in the right, you could effect some considerable improvement. Otherwise, and especially if it is a mono recording, you have very little chance.
If you want to, you can click in the waveform, drag a selection lasting a few seconds where both voices are mixed together, then File > Export Selection and choose WAV (I assume you have Audacity 2.0.2 now). Then attach the WAV (see https://forum.audacityteam.org/t/how-to-attach-files-to-forum-posts/24026/1 for how to attach files).
Gale (By the way, I’m male).