Searching for a drama about a girl who works in a hotel and a rich guy that stays there.

 I can remember is a scene where they end up falling on the bed and one where she is walking down the isle in a dress with a vale over her face and she sees him but he can't tell who she is until she gets down to him and he lifts the vale.  I am pretty sure she cleans his room and he is a returning guest. They always seem to run into each other and something happens. 

https://mydramalist.com/7998-love-is-the-best

I think you are talking about this one

 LoveGirl:

YES!! Thank you!!

You're welcome