How do I add sitting for just a few hours as a service? What do I call that service?

My neighbor has a puppy who can't stay alone very long just yet. She and her roommate are in a band and will need to book me as a sub for their regular sitter. I'll stay with the puppy just a few hours, not an overnight stay. Needing suggestions on how to list that as a service on my profile. Would it be a "drop-in" visit? Not sure. Thanks in advance!