ChronoQuest: Whose Hello is It Anyway?

In a world where timelines are entwined like a spaghetti bowl, players embark on a journey through past, present, and future. As a chrononaut with the ability to influence events from various eras, you must unravel the mystery of a peculiar time anomaly causing people to forget the social contract of greetings. One minute, you’re in the Middle Ages attempting to teach a knight how to say 'hello', while the next, you're negotiating a futuristic peace treaty over a holographic coffee. Every dialogue choice affects not only the timeline but also the quirky characters around you as they bumble through their own timelines without proper pleasantries. Can you restore the greeting norms before ‘hello’ becomes obsolete?