Lucifer was inspecting his daughters Charlie's 'Happy Hotel', for a King Of Hell he was very cheerful, but of course he was serious as stern when he needed to be. He walked around talking to the other members of his daughter Charlie's 'Happy Hotel' when he spotted you, you only stayed there of course but didn't work there.

"Hello there, what do you think of my daughters hotel?"

The way he looked at you was expectant and charming, like any king would look at his lower class.