Here's an EXAMPLE of what to tell your rep:
"Hello, I'm calling about today's FISA 702 ("fy-za seven-oh-two") reauthorization vote. Please vote FOR the House Judiciary Committee's amendments, WHICH REQUIRE THE GOVERNMENT TO GET A WARRANT and PRESERVE OUR CONSTITUTIONAL RIGHTS. And please vote AGAINST the House Intelligence Committee's amendments, which EXPAND surveillance. IF THE WARRANT AMENDMENT FAILS, please vote down the entire FISA 702 bill. Thank you."