By Nektaria Stamouli 

ATHENS--The Greek government moved Saturday to repair the relations with its international creditors, after a turbulent first week at the office and as Prime Minister Alexis Tsipras and Finance Minister Yanis Varoufakis embrace for a fresh round of meeting with European counterparts.

Mr. Tsipras toned down his rhetoric and appeared confident the country will reach a deal soon with its creditors, the European Union, the European Central Bank and the International Monetary Fund.

"The deliberation with our European partners has just begun," Mr. Tsipras said in a statement emailed to Bloomberg News Saturday. "Despite the fact that there are differences in perspective, I am absolutely confident that we will soon manage to reach a mutually beneficial agreement, both for Greece and for Europe as a whole."

His comments come a day after a meeting between the new Greek Finance Minister Yanis Varoufakis and the head of Eurogroup Jeroen Dijsselbloem in Athens, which ended with tough rhetoric and an exchange of grimaces.

Mr. Varoufakis dismissed Greece's strict bailout regimen as "based on an anti-European logic," visibly angering Mr. Dijsselbloem, who warned Greece against "unilateral steps and ignoring previous arrangements." The two men left the room after a perfunctory handshake.

Late Friday, the Greek premier has called the head of the European Central Bank, Mario Draghi in order to assure him that Athens was looking for an agreement, according to a senior government official.

"Talks were conducted in a good and reassuring spirit," the official said.

Mr. Tsipras has also spoken over the phone with the president of the European Parliament, Martin Schulz and Mr. Dijsselbloem late Friday.

"Mr. Dijsselbloem has called the Greek premier in order to reassure him that the negotiations will continue normally, despite the signs of tensions during the press conference," the official said.

Mr. Varoufakis will meet his French counterpart Michel Sapin in Paris on Sunday, according to a statement by the Greek Finance Ministry. On Monday, he will be in London to meet the U.K. Chancellor George Osborne.

On Tuesday, both the Greek prime minister and Finance Minister will be in Rome, where they will meet their Italian counterparts.

On Wednesday, Mr. Tsipras will meet the European Commission President Jean-Claude Juncker in Brussels and the French President François Hollande in Paris in the afternoon.

Greece's Finance Ministry announced Saturday that it had hired financial consultancy firm Lazard to consult on issues of public debt and fiscal management.

The country used the same financial adviser in 2012 during talks over private-sector involvement as it sought to write down billions of euros of debt in a major sovereign restructuring.

Write to Nektaria Stamouli at nektaria.stamouli@wsj.com