YOU SAID:

Let's not start this trip on such a downer.

INTO JAPANESE

そんなダウナーな気持ちでこの旅を始めるのはやめましょう。

BACK INTO ENGLISH

Don't start this trip with such a downer feeling.

INTO JAPANESE

そんなダウナーな気分でこの旅行を始めないでください。

BACK INTO ENGLISH

Don't start this trip with such a downer feeling.