Good luck to somebody - Idioms by The Free Dictionary
good luck to somebody
good luck to (someone)
A phrase used when one thinks that someone is about to do something difficult or likely to fail. I could never ask the boss for a raise so soon after being hired, but good luck to her.
good ˈluck to somebody (spoken) used to say that you do not mind what somebody does as it does not affect you, but you hope they will be successful: It’s not something I would care to try myself but if she wants to, good luck to her.