Them: I still have that problem we discussed last week, can I see you at 8am? I really need it fixed.
Me: I'm free at 9, but as I said in my last message I don't know how to solve this yet anyway. Have you tried X like I suggested? Did that change anything?
Them: I did Y several times and also Z. It didn't help.
Me: But did you try X?
Them: How about at 11am? Can you fix it then? I'll do Y again now.
Consider this a friendly, local pub. Make yourself at home, bring your friends, have a good time! Meet new people, have a laugh, enjoy the ambience, and the Oxford commas.