If you don't want to carry a USB drive, make the document portable.
Since "JF Banumathi" refers to a popular Sinhala font (often used in Sri Lanka for creative designs, subtitles, and headers), a "portable" version usually implies a way to use the font without installing it into the Windows system fonts folder. This is useful for school lab computers, office computers with restrictions, or keeping your system clean. jf banumathi font portable
"free fonts download" websites full of pop-ups. The safest sources are: If you don't want to carry a USB