It's part of the gameplay in the first LiS. You can rewind time at the beginning of each map and go through different dialogue options for each character or new ones open up if you learned something from previous conversations from a now changed timeline. It also let's you skip through previously viewed dialogue during the conversation. The only time the game takes this away from you is a very tense and emotionally charged section where Max's powers for reasons never explained in the narrative just don't work (meta reason: for drama and Max's dialogue choices really matter with no "chance" to change the outcome which is very heavy). If you're interested in Life is Strange, I recommend giving it a shot. The first episode is free on Steam, and I think on other platforms.