How to separately filter parameter from number of parameters on SSRS report

I have created SSRS report with multiple parameters using SharePoint list data .

I want filter report separately as per parameters.

Means when i enter name in text box the report will be generate on employee name.

Then if i select value from drop down list then report will generate on employee name with selected drop down value.

If i enter date in calender then report should be generated using all this conditions

each parameter should be independent.