@Bkassebaum,
The only information I have on it would likely preclude Patsy Cline from having sung or recorded it. It was written somewhere during the mid to late 1960s and unfortunately, Cline had died in March of 1963.
Englebert Humperdinck did record it in September of 1967.
Patsy Cline had a recording and hit song Tennessee Waltz.