I like the dialogue system as is. Dr Koin sums it up well.
I will add that I would like to hear a character quip when we select these options (like a combat bark but more for expressing general sentiment/emotion)
ie when selecting "Gently tell her not to be afraid and place a reassuring hand on her shoulder" we hear our lizard character make a consoling noise.
ie. when selecting "Insult him" you hear an angry grumble
That would not require much voice work and would aid in creating a mood for each line that required it.