Fake, Flaky, or Forgetful?

They speak to you as if they've never spoken to you before. You remember the room, the lighting, the questions, the laughter and everyone else who was present there each time you had met before. They leave you flummoxed. They keep doing it again and gain. You keep smiling through it each time and reintroduce yourself, when spoken to the next time (again). They leave you perplexed. Close the door? Walk away? Stop smiling? Perhaps just decide to be kind. Yes, again.