AR/AP Netting - Customizing e-mail body using a custom netting letter template

Summary:

AR/AP Netting - Customizing e-mail body

Content (please ensure you mask any confidential information):

We customized the netting agreement report and we send e-mail to the customers/suppliers.

The body of the e-mail contains the following text:

"The offset of accounts payable and accounts receivable transactions was carried out on [date] for [amount] EUR.
Details are available in the attached statement.
Please do not hesitate to contact us if you have any questions or issues.
Kind regards,"
I translated it from italian, but this is the standard version.

I'd like to change this version into a custom one.