Dog tried to bite me

This is my first time dog sitting through Rover but I do have experience outside of it. I am pet sitting at the owners place for 4 nights. The pup is an older dog and he’s kind of weird so I just let him do his own thing and made sure to pay attention to his cues. He has attempted to bite me twice during my stay but the first one was my fault, he had just woken up and was getting adjusted. I went to leash him to go for a walk and he bit at me and growled. Second attempt was me trying to catch him from falling off my lap and he bit at me again. What would you guys say to the owner? He’s a sweet boy but I don’t want to downplay his actions either.