What is the nicest thing that someone has said to you in a relationship?

I've had so many nice things said to me that it's hard to count but most recently I was at an airport and brought up small talk with a woman and then now she left she said I just wanna let you know you're beautiful eyes when did hanging out later because her flight got delayed and I booked a new one but that was nice

Probably when she said like, who are you and why are you in my house?