Here is 1 saying encoded using a letter for letter replacement:

R: LHV GP GM MHJM MHU NDIU JYYSIJYV VDS AUNJZA KIDN JZ GZMUICDFJMGDZ
KSZYMGDZ, MHU NDIU UOCUZPGTU GM BUYDNUP MD YDNCSMU?
J: MHJM'P MHU FJL DK PCFGZU AUNJZA.