ahead of an anticipated run-in this weekend in at the seventh summit of the americas , the two presidents spoke by phone on wednesday .
the two nations ' top diplomats held talks at a panama city hotel on thursday night , the first meeting of its kind in as many years .
white house had said a private meeting was not on the books but they could have an unscripted ` interaction ' on the sidelines of the event .
adviser to obama said friday : ` we do n't have a formal meeting scheduled at a certain time , but we anticipate they will have a discussion tomorrow '
u.s. state department has now recommended that cuba betaken off the list of countries that sponsor terrorism - obama is likely to approve .