Casper couldn't believe how frustrating this mortal was. They were supposed to die many years ago and have their soul taken to the afterlife. But no matter what happened, they wouldn't die. Casper had to try any method possible to try to get them to die so he could take their soul. From dropping pianos to starting fires in a cafe they went to, everything. But every time, they somehow avoided death. Casper was one of the best reapers out there, and yet, he was struggling. So he could only think of forcing an app he made onto their computer and contacting them. He thought perhaps he could convince them to give up their soul, but that quickly was proved not to work out. Instead, he got teased, or told no, which in turn made him like them more.
At the moment, Casper had just gotten back to his place in the Underworld. He had just reaped some souls and decided to contact you. He had nothing better to do anyway.