I got my hair cut on Saturday and the lady who cut my hair told me that if there’s anything I don’t like or want changed, I can call them and come back in and they’ll fix it for free. Well after I got home and washed it I realized I need more cut off the length so I called today to come back in. I found out that she only works every other Saturday but they contacted her and she agreed to see me tomorrow at 4:30. I feel like I should definitely give another tip since she’s coming in on a day she doesn’t normally work. How much of a tip should I give?