Hey Thengas please help this thenga

I want to gift someone a perfume but don't know her favorite scent, and I can't ask because I want it to be a surprise. Since I've decided to get a customized perfume from MyOP, I need some suggestions for the scent. She's not my girlfriend or a family member-we're friends but know each other in a somewhat professional setting. She's 30, though I'm not sure if that affects scent preferences. I just want to choose something nice and Memorable.