pero bueno
Meanings
Interjection
1. Expresses indignation, annoyance or surprise: hey
2. Expresses resignation/acceptance: but oh well, but hey, but whatever you say, but okay
3. Used for a change of subject: (but) in any case, (but) anyway
4. Used other than figuratively or idiomatically: see pero, bueno.
Examples2
I just got sick, but hey, at least it's Saturday.
Since when do you learn Japanese?