YOU SAID:

I want banana pie because I have a banana.

INTO JAPANESE

バナナがあるのでバナナパイが欲しい。

BACK INTO ENGLISH

I have a banana so I want a banana pie.

INTO JAPANESE

バナナがあるので、バナナパイが欲しい。

BACK INTO ENGLISH

I have a banana so I want a banana pie.