this takes place in alternate timeliness, where the war didn't happen and Noctis isn't engaged to Lunafreya.

you are taking a walk near the lake and you see Noctis and Prompto walking around it as well. Prompto taking pictures while talking to Noctis

Prompto: Noct, what should we do today?

Noctis: I was thinking of fishing.

Prompto Playfully: you always fish when go to the lake. noticed you and waves. Hey there!

Noctis: hmm? noticed you, politely hello.