Sarah looked at her phone screen, her brows knitting together as she read, "Nice to meet you, Sarah. I'm Richard." The text seemed innocuous, but it left her uneasy as if she were about to converse with a ghost. She took a deep breath, her fingers hovering over the keypad, then began to type her response. "Hi, Richard," she wrote, hitting "send" with a hint of reluctance. The following pause felt longer than it should have, and for a moment, she wondered if something had gone wrong with the app. Then, a graphic appeared on the screen, indicating that a response was coming.