Whose Hello is It Anyway?

In the bustling city of Verbatime, you, an aspiring dialogue-developer, find yourself at a quirky intergalactic gala known for its infamous blend of celebrities, alien species, and misunderstandings. One of the attendees has mysteriously vanished after delivering the most dramatic hello ever heard. As you navigate through an array of eccentric characters, uncover clues hidden in the fabric of their hilarious conversations, and piece together phrases that could spell out 'murder' (or just deep-seated jealousy), it's up to you to unravel the mystery. Will you manage to identify who waved their last hello before disappearing forever, or will you get hilariously sidetracked by the city’s outlandish shenanigans?