"Dialogue options" refers to the choices or responses a person can make during a conversation or interaction with someone else. It means the different ways you can express your thoughts, ask questions, or respond in a conversation. Full definition
This is to emphasis the fact that a lot of combat situations can be avoided via stealth or a huge variety of dialogue options that can be accessed depending on your skills and talents. (wolfsgamingblog.com)
Often you are required to pick the right dialogue options in order to obtain something you need and progress with the story. (gamingunion.net)
That choice may add in new dialogue options for the main story or other side missions. (playstationlifestyle.net)