This is something I have been working on since 2017. The project has been in various versions over the years from a party line to interactive bots. Not only does Lenny maintain a high average call duration but it can be slightly random on redial which adds to the fun. Once he enters story mode with the telemarketer it's truly the best once he tell you about his 3rd eldest.
Lenny currently answers on 3199 phone numbers and gets about 500 calls a day, has generated 180TB in compressed recordings since 2017. If anyone could use this dataset for AI learning let me know.