I dreamed I was answering calls from a phone that didn’t exist

I was sitting at the console, same as always—headset tight, fingers on the keys—but the line was open and no one was on it. Just silence, then a voice saying, 'This is the third time you’ve missed me.' I looked down and realized the phone in my hand was made of light. No buttons, no cord. I tried to say something, but my voice came out like static. Then I woke up, still holding my real headset, the one with the worn earpad. It’s been six years since I last had a dream about the job. And this one left me with the weird feeling that maybe the calls never really stop.