In SS fandom we usually affiliate ‘thank you’ with that iconic chapter 699 forehead poke moment. And as much as I love 699, I also feel like this little moment between them is quite underrated. Sakura doubted herself, Sasuke noticed it, he tried to boast her self-confidence because even he knows she is a smart girl, she thanked him quietly and he smiled to himself. They have a unspoken connection and I think it’s beautiful.