かな (sentence-final particle)
Usage
(V / いA / なA ~~-だ~~/ N ~~-だ~~) かな
Is used when posing a question that does not demand an answer
For an invitation or request has a softening effect, making the invitation or request less direct
Examples
お父さんの誕生日のプレゼントは何がいいかな
I wonder what I should get Dad for his birthday
明日みんなで桜を見にいくんですが、先生も一緒にいらっしゃらないかなと思いまして。
We're all going to see the cherry blossoms tomorrow, and I wondered whether you might not like to come with us.