Parent who is one time, but takes their time leaving

[Crayola kiddies]

I had that problem with one parent and now I have the child ready at the door and standing there when parent walks in and I say to the child "ok give me five and have a good night". Then I say to the parent " xxxx had a great day see you tomorrow " and I put my hand on the door. Worked like a charm. Now parent walks in says to child are you ready? Then they go! If this doesn't work then say to the parent sorry I'm really busy i dont g
have time to chat have a good night....and block the way so they can't get in. And if the child runs off grab him/her and say nooo the day is over and it's time to go have a nice night..... And don't let them run off. I put a gate up for that reason so they can't get away and if parent is a few minutes late I have a chair where they can sit if I have to step over the gate to attend to something else