Since there are no matches, that means he doesn't have a profile existing yet on WikiTree. So you can go ahead and create the profile! Just be sure to set the appropriate privacy level for any family that are still living.
Your greeter has posted a link to a Help page that gives more details about how to work on WikiTree. You can also send her a message if you have any questions about getting started.
I hope that helps! Welcome to WikiTree, and enjoy!