Include humanised back-chanelling or minimal responses for FIN voice

One of the keys points with conversational support is the use of minimal responses such as “mmhmmmm” or “yep” whilst actively listening, these are verbal and nonverbal cues that show the listener is engaged and actively following the speaker's message. They indicate that the listener is paying attention and encourage the speaker to continue their turn. It would add huge value and trust to our customers if this were possible