от всей души поблагодарить(Last but certainly not least, the entire UCONN Ski Team family would like to extend a heartfelt "thank you" to Larry Gianatti, as we say goodbye to him as our coach. 4uzhoj)
чистосердечное извинение(I offer my heartfelt apologies – от всего сердца прошу прощения. I would like to extend my heartfelt apologies (to someone, usually a group of people) – я хотел бы выразить мои чистосердечные извинения rebelpants)