Hi Phani,
Sorry for the delay in getting you.
We do have support for following requirements.
1)Create a workbook based on template containing Charts and other formats.
2)Adding a sheet containing charts to workbook.
3)Adding multiple sheets to the workbook.You Can add a new sheet to the workbook by using Create method.
workbook.Worksheets.Create();
Please take a look at the attachment and let me know if it meet your requirements.
http://www.syncfusion.com/Support/user/uploads/copyingchartSheet_6727306e.zip
copyingchartSheet.zip
BestRegards,
Bharath.