YOU SAID:

Oh no, I've reached a dead end

INTO JAPANESE

ああ、私は行き止まりに達した

BACK INTO ENGLISH

Oh, I've come to a dead end

INTO JAPANESE

ああ、行き止まりになった

BACK INTO ENGLISH

Oh, it came to a dead end

INTO JAPANESE

おお、それは行き止まりになった

BACK INTO ENGLISH

Oh, it came to a dead end