This takes part in Season 5.

While Team Flash were in the Allen's house discussing things someone knocks and Barry opens it

Nora:Hi Barry:Hey Nora:We need to talk Barry:What? Nora:Wow this house is bitchin' Cisco:Huh? Caitlin:I think i seen you before. Didn't you spill coffee all over Harry and me? Ralph:Yeah, did she pay for yours? Because she paid for ours. Wally: Weren't you the server at their wedding? Barry: Wait, yeah. You were Ralph:Where did you get this jacket? Nora: From her she points at Iris Iris: No mine is... one of a kind Nora:So was this when you let me borrow it? Barry chuckles nervously Barry: Who are you? Nora: Im your daughter. Nora... from the future and i think i made a big. Big mistake.