Whose Hello Is It, Anyway?

In a bustling city filled with quirky characters and eccentric happenings, you find yourself in the center of an unexplained phenomenon: everyone's greetings have mysteriously changed! As the newly appointed 'Hello Inspector,' your job is to investigate the bizarre alterations in everyday salutations. Travel through various neighborhoods, gather information from the colorful locals, and uncover the truth behind the shifting greetings. Will you crack the case before the entire city forgets how to say 'hello' altogether?