YOU SAID:

Olivier is going to be sick on his next flight.

INTO JAPANESE

オリヴィエは彼の次のフライトで病気になるだろう。

BACK INTO ENGLISH

Olivier will get sick on his next flight.

INTO JAPANESE

オリビエは彼の次のフライトで病気になるでしょう。

BACK INTO ENGLISH

Olivier will get sick on his next flight.