Dialogue 'least costly' exit for Venezuela crisis: UNASUR UNASUR Secretary General Ernesto Samper says at a press conference Tuesday in Quito that, in political and social terms, dialogue is the "least costly" exit from the differences between Venezuela's political sectors. He also said the Colombian government and ELN need to work on trust to be able to sit down at the negotiation table together, during an interview with AFP. IMAGES AND SOUNDBITES