Dynamically populate pdf File name in 'Save As' dialogue box

[Former Community Member]

We have  rendered a pdf using adobe webservice.

Once the pdf is generated , and we click on saveAs menu dialogue box opens and default name is populated in fileName field.

Can it be possible to populate that name dynamically ? We tried using response.addheader() but it didnt work.

Note : We are using java to create xml which we are passing to adobe webservice.