Russia is prepared for a dialogue with the United States at the summit level, but no dates of a future meeting between the two leaders are discussed at the moment, Deputy Foreign Minister Sergei Ryabkov said at a session of the discussion club Valdai on Tuesday, TASS reports."We would like to have a dialogue with the United States at all levels, including the summit level," he said. "Work is in progress on a possible agenda and content. Regrettably, no discussions of these matters with the United States are underway, because we have no understanding when and where such a meeting might take place."