The two legislative bodies form a conference committee generally results when the Senate and the House of Representatives pass different versions of the same bill
Explanation:
The House and the Senate are the two bodies in the U.S. Congress. For a bill to enhance law it has to relinquish both the House of Representatives and the Senate prior it is transferred to the President for his signature. The House and Senate transferred somewhat distinct variants of a bill.
If this happens both the House and the Senate delegate conferees to act out a settlement. This commission is termed a "conference" committee. If the conference committee can enter an agreement among the House and Senate versions, the bill goes behind to them for a final vote.