regular-expressions to match all the relative path in string

How to write a regex to filter all the string with relative path format i.e.starts with ser_ver/ and ends with .dat and inbetween may have _,-,/ like following,

file1 ser_versha-resubfolder_1.dat
file2 ser_versha-refolder1subfolder_1subfolder_2.dat
file3 serversha-recomplexsubfolder_1.dat
file4 serversha-re5555AB12subfolder_1subfolder_2subfolder_3.dat

expected:

ser_versha-resubfolder_1.dat
ser_versha-refolder1subfolder_1subfolder_2.dat