Sincerely
/sɪnˈsɪəli/
adverb
In a sincere or earnest manner; honestly.
“I sincerely hope they make it home safely.”
A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended by his or her name.
Synonyms: best regards, regards, sincerely yours, yours sincerely, yours truly, earnestly, genuinely, honestly