New Delhi, May 15 (ANI): Congress Chief Sonia Gandhi hosted a farewell dinner in New Delhi on Wednesday for Prime Minister, Manmohan Singh, as he prepared to leave office after presiding for a decade over the world's largest democracy. A momento, signed by all members of the Congress Working Committee (CWC) and Union Ministers, was also presented to Dr Singh by Sonia. Several top party leaders, including P Chidambabaram, Sushilkumar Shinde, Salman Khurshid, Jyotiraditya Scindia and Ajay Maken, were present for the dinner at 10 Janpath in Delhi. However, absence of Congress vice-president Rahul Gandhi's from the send-off dinner raised many political eyebrows. Congress leader Rajiv Shukla, who attended the thanksgiving dinner said that Singh was felicitated by Sonia Gandhi.