def string_has_employee_name_in_it(test_string):
    test_string = test_string.lower()
for name in ListEmployee:
    name = name.lower()
if name == test_string:
    return True
elif name + '\xc3\x82\xc2\xae' == test_string:
    return True
elif test_string.endswith(' ' + name):
    return True
elif test_string.startswith(name + ' '):
    return True
elif ' ' + name + ' ' in test_string:
    return True
return False
final_list = []
for string in ListSentence:
    if string_has_employee_name_in_it(string):
        final_list.append(string)
How can I use regex to search inside sentence -not a case sensitive