How to edit Woocommerce mail Calncelled Order for Costumer?

Hello

Im sorry but i dont have understood where i could edit the mail Cancelled that is sended to the costumer.

I correctly activated it under WOOCOMMERCE > MAIL (first screen)

But when i try to click on the pencil to edit i will redirect to a custom template, and in the select dont appear. (second screen)

Best regards and thank you for the help!