Wink Wink Nudge Nudge...Um No.

Customer leans over to me from his place in line at register 1: Can I cash out there? (points to self serve)
Me: Sure.
Customer: Can you walk me through?
Me: Sure I can show you how to do it. (starts leading him to first available register
Customer: Oh I don't really want to do it at all.
Me:(pretends not to hear that) Here you go. I'll show you how it works. Just hit Start.
Customer: (nudges me with his elbow and a grin) I don't want to cash myself out. You can just do it for me, right?
Me: Uh no. This is self serve. I'm supposed to talk you through how to do it yourself. (points back to regular register)
Customer: (huffs and goes back to regular register)