Font is changed from Arial to Calibri after RTF document generation

 Hi,

I am using a Text to doc generate smart service to generate a RTF document. But some where in generation my document font is changed from Arial to Calibri. We are using "getAsciiContentByDocumentID" custom function to generate a Ascii code and this code is an input to the "Text to Doc Generate" smart service. Please suggest what we can do to fix the font issue.