Mystery flower

A quick one today as I got home a bit late. Haircut after work and then a quick stop at mom and dad’s to drop off a gift for my brother to take to Greece when he leaves Monday.  And to say goodbye to my parents as I won’t be able to stop tomorrow. 
This plant was given to me by a friend of mine last year was she was thinning out her perennials. I don’t know what it is, but it has small, dainty flowers.