Islamabad: Pakistan's formal negotiations on US Reciprocal tariffs kick-started between Mr. Muhammad Aurangzeb, Pakistan's Finance Minister and Ambassador Jamieson Greer, United States Trade Representative through a telephonic/conference call on Friday.The two sides exchanged their view point through a constructive engagement with the understanding that technical level detailed discussions would follow in the coming few weeks.Both sides expressed confidence in advancing these negotiations for successful conclusion at the earliest.