Adjust volume of 2 people on 1 audio track

You may want to do razor slices (You can hit Control or Command K while it’s playing if you like) around the quieter person, select the section and adjust it with them with the audio clip mixer. I’m also a big fan of selecting all of the  quieter clips (simultaneously by pressing left click/shift) and doing a right click/audio gain over one of the selected clips and bringing up the audio gain simultaneously with the blue numbers.