find manager of employee in sharepoint workflow using VS2010

Question

using visual studio to create  squential workflow ( sharepoint)

how i find the employee manager
 
i have 2 list 1 for employee(id ,name,cell no ,manager id... these are list fields )
 
which holds manager id and other is for manager (id,name,cell no... these are list fields )
 

my requirement is
when user request for leave this request goes to relavent manager to accept/reject
thats it....

thanks