By Renee Maltezou and George Georgiopoulos ATHENS (Reuters) - Greece is willing to compromise to reach a deal with its EU/IMF creditors that is acceptable to both sides and is ready to negotiate until the end of June to achieve this, the government said on Monday. The comments struck a more conciliatory note after Prime Minister Alexis Tsipras's outright rejection of a proposal from lenders last week, and suggested Athens is willing to make concessions despite anger within the ruling Syriza party over the austerity cuts needed to secure a deal. Tsipras rejected on Friday as "absurd" international creditors' terms for a cash-for-reform deal to keep Greece from default, prompting an angry response from European Commission President Jean-Claude Juncker.