Hover over to "For Hosts" tab and select Upload conversation
Fill out the Upload Form.
Drag and drop or select the file you want to upload into the audio file section and wait for the Trim Audio option to appear under the file.
Select Trim Audio.
Play and select where you would like your final audio file to begin and end. Use the Zoom in/out feature to get a more in depth look at the audio and identify where you would like your trim to start and end. Then drag the Green bar to cover the parts that you would like to trim.
Now you can upload your conversation with the parts you identified trimmed off of the final audio file.