How to procede with "idk"

The only day she was free was Wednesday but I was really busy so we reschedule for next week
Today:
Me: Ryan gosling meme
Her: Ahahah hey
Me: how's the weekend going
Her: Good what about yours?
Me: Good, just finished a workout
Looking and nice for our date
Her: ahahah sounds good :)
Me: what days are you free for our adrenaline date? (we have like a inside adrenaline joke)
Her: ahahah idk
What should I do with "Idk"