Need search functionality by using Slicer in Power BI

I have a dashboard with data columns 1) "Firstname" 2) "Firstname Lastname"    and i am using Slicer to fetch data for "Firstname" column. here if i check option for "Firstname" in Slicer, my dashboard shows only "Firstname" column data.

 

Here I am looking for my dashbaord should show all the columns text associated with "Firstname" i.e In my Slicer if i select option as "Firstname" then my dashboard should show data for both "Firstname" and also other column data i.e "Firstname Lastname"  ( WHICH MEANS TEXT ASSOCAITED WITH SLICER OPTION). Please let us know how to achive in Power BI.

 

Appricate your help/sugestions in advance!..

 

Have a Good day!...