"Dialog choices" refers to the options or decisions given to a person during a conversation or interaction, allowing them to select what they want to say or how they want to respond. Full definition
There are also dialog choices that don't actually give you new conversations which really makes me question why they implemented all this stuff instead of just allowing your character to speak 24/7. (monstervine.com)
Players will tell a branching story as they progress through the game making dialog choices. (xblafans.com)
You will click through dialog choices, of which, at least from my experience, feels like there is little divergence in story or alignment based on how you respond; the end result always seems to be the new objective points revealing themselves on the map. (buttonmashing.com)