Greek Prime Minister Alexis Tsipras has promised his government will submit "credible reform" proposals to its creditors on Thursday.
Mr Tsipras was speaking during a fractious debate on the Greek debt crisis in the European Parliament.
Greece is desperate for a third bailout to avoid bankruptcy and possibly crashing out of the euro currency.
Meanwhile, the Greek government has insisted that there is no threat to food and fuel supplies.
In a statement, the Ministry of Economy, Infrastructures, Maritime Affairs and Tourism "reassures both the Greek citizens and the visitors (tourists) that there are adequate food supplies in the market and that their prices remain stable".
European leaders have set Thursday as the deadline for serious reform plans from Greece in exchange for more aid.
An emergency summit involving all 28 European Union members - not just the 19 eurozone countries - will take place on Sunday.
Greece would "file new concrete proposals, credible reforms, for a fair and viable solution," Mr Tsipras told MEPs.
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