keeping a needed NA value but also replacing the NA by empty fields

I ve a dataset which contans a field out off the database with NA as result, which I must keep. The output I created with

write.table(dataset,row.names=FALSE,sep=";",na=""

,file="C:\Users\mwijn\OneDrive\Documenten\Engie\Output\Delete_File.csv")

because I use na="" all fields are blank, but the field SS Reason should contain na if empty. could use a IF then statement I think but due to I ve less experience in R, found no correct way to solve this.

Hope someone can help in this.

File SSV Action Wall Mount SS Reason Number Floors Height Cable
EXPORT N IRREG 2
EXPORT N IRREG 3
EXPORT N IRREG 2
EXPORT Y 2 5
EXPORT N IRREG 2
EXPORT Y 2 5
EXPORT Y 2 5
EXPORT N IRREG 2
EXPORT Y 2 5
EXPORT N IRREG 2
EXPORT N IRREG 2
EXPORT N IRREG 2
EXPORT N IRREG 2
EXPORT N IRREG 2
EXPORT N IRREG 2

This looks like a problem to be solved long before a *write.table command.

We need to see some sample raw data and the output data. Some code would also be useful.