What's happening here?

The next day Gavin rushed into the building where he was gonna work. Podd was talking with someone. Podd stood up from the chair and looked at Gavin. "Who is he?" Gavin asked Podd. "He is our guest" Podd replied and called Kitty, his teammate. A beautiful girl stepped towards him. "Please take care of our customer. And also take Gavin with you. Let him know how we work here" Podd instructed her. She smiled and nodded her head saying yes. Podd walked away from them to the kitchen. "I didn't see you before. Where are you from?" Gavin asked the girl. "Idk why you didn't see me before" she replied and greeted the customer. "Do you know how this guest sees this building?" Gavin asked his doubts. "Look how he sits. He looks tired and he has puffy eyes. It looks like he had no sleep for days. I guess it's what he feels. And you didn't get the glasses? By wearing those specs we can see what the customers see" she replied. "Or else we should ask him what he wants," she added. "I didn't get the specs" he said. She handed over the specs to him. He wore that and started to see a different place around him. His eyes became wide after seeing that. "Then… What do you see this building as?" Gavin asked. She suddenly looked at his eyes and didn't reply. She showed the customer his room and closed the door. "After life," she said. Gavin looked at her. "What?" he asked. "I see this building as a place where the after-life decisions are made. I mean… I see everyone here as a grim reaper. And that's true. Podd is one of them. " she replied and vanished into the air. He was surprised to hear her words and didn't see where she went.