ISLAMABAD - The US Special Representative for Afghanistan and Pakistan, Richard Holbrooke Thursday phoned President Asif Ali Zardari, reassuring that Pakistan would not be left alone in the current situation. The spokesman of Aiwan-e-Sadr said both the President and the US envoy discussed the war on terror, regional situation and Zardaris upcoming visit to the US. During the telephonic conversation, the President said that Pakistan had been a frontline state in war against terrorism and the world community should address the countrys concerns and reciprocate economically. The world should understand Pakistans situation and they should help the country to combat the menace of terrorism, the President was quoted as saying in the discussion. The US Special Representative said that his country would not leave Pakistan in the lurch and both would take the fight against extremism to its logical conclusion. President Asif Ali Zardari is likely to visit the US in the first week of May and he is also scheduled to meet President Obama and discuss with him bilateral relations.