For the mock cold call at the end of most SDR interviews.
“Hi [Name], this is [You] from Greenhouse. I know I'm calling out of nowhere. I talk with recruiting leaders about making hiring more organized and consistent, and I wanted to see how it works at your company. Is now an okay time?”
Written from public information about Greenhouse to help you practice. Ask an insider what their role play looked like; it's the best prep there is.