The following URLs may be useful to you.

http://www.yodiz.com/blog/writing-user-stories-examples-and-templates-in-agile-methodologies/

http://www.sampletemplates.com/business-templates/user-story-template.html

Thank you very much for these links, Kapila

It seems that User Stories have not received much in the way of research interest.

Regards

Daune

 Found some good resources about user stories. They may be useful.

Need to find the Full paper for last two. 

https://medium.com/@jonatisokon/a-framework-for-user-stories-bc3dc323eca9#.we37c5ym1

https://www.liquidplanner.com/blog/5-reasons-to-use-story-maps-for-your-next-project/

https://mariagraziamerlo.com/tag/user-stories/

http://link.springer.com/chapter/10.1007/978-3-319-30282-9_14

http://www.sciencedirect.com/science/article/pii/S095058491500172X