An edit can be technically correct and still feel strange. One reason is a sudden move from the low sound of a room to complete digital silence. Room tone is a short recording of that room while nobody speaks. It can help an editor join two parts of a conversation without changing its setting.
Capture the same room, not a different one
Before the interview begins, record twenty or thirty seconds with the microphones in their normal positions. Keep the same gain, headphones and room setup you will use for the conversation. Ask everyone to stay still. Do not switch off a fan for this sample if it must remain on during the interview.
Repeat the sample after a major change. For example, moving to a smaller room halfway through an interview creates a different sound. Label the two samples by room or session section instead of calling both files room-tone-final.
Use a small amount
When removing a long interruption, place a short piece of room tone in the gap. Listen to the words on both sides. The goal is a natural pause, not a perfectly flat waveform. A copied section containing a chair squeak will make that squeak repeat, so inspect the sample before using it.
Room tone cannot repair every problem. It will not remove an echo from spoken words or restore clipped speech. If the background noise is distracting throughout the interview, improve the room before recording more material. End the setup by keeping the sample beside the original voice tracks, where the editor can find it.