The PDF utilities from the poppler-utils packages include many tools to deal with PDF files, one of them is pdftotext.
pdftotext can be used to convert PDF files to ODT.
I want the same result using GUI application not command line. What could I use?!
You can try Calibre, which is a GUI for managing and converting ebooks. Also capable of converting to docx.
Try online tools...
Some of them are:
http://www.zamzar.com/convert/pdf-to-odt/
https://online2pdf.com/convert-odt-to-pdf
They also has other conversions available
Regards...
