YOU SAID:

One should exercise caution while speaking to me

INTO JAPANESE

私と話をしている間は注意が必要です

BACK INTO ENGLISH

You need to be careful while you're talking to me.

INTO JAPANESE

私と話をしている間は気をつけて

BACK INTO ENGLISH

Be careful while you talk to me.

INTO JAPANESE

私と話をしている間は気をつけて。

BACK INTO ENGLISH

Be careful while you talk to me.