Conversations aren't harcoded, they are taken from a text file, where you specify the phrases, the different conversation options and animations for each, also the name of the character. This means its an "automatic" system, with the same action you can have infinite different characters and conversations.
About highlighting the answer by size instead of doing it by color, I did this because I would like to keep the HUD in white color, as its a postapocalitic environment I think there shouldn't be too much color variation, to keep that "dirty and sad" look.



thanks!