Austria and many other European Union states depend on Russian Federation for natural gas.
At the start of a new presidential term and on a drive to improve living standards, Putin also used the event to try to reassure Russians about the economy.
As anticipated, domestic issues dominated the session. One of the hosts asked him to tell a joke.
Putin also said he thinks about raising "a new generation of young managers" who will be in a position to take the helm in Russian Federation. "We have started on the trajectory towards robust economic growth in Russian Federation".
Putin said he understands Pyongyang's demand for a security guarantee.
Under Russia's constitution, Putin is in his final six-year term as president, meaning, theoretically, he should step aside in 2024.
Later, Putin ordered a partial withdrawal of Russian troops from the war-torn Mideast country.
"The congressional election campaign is getting under way and then there will be the next presidential election, and the President of the United States is coming under attack over various matters", Putin said.
President Donald Trump, right, and Russia President Vladimir Putin in Vietnam in 2017.
"It appears our partners thought that this would never affect them, this counterproductive politics of restrictions and sanctions", said Putin. "But now we are seeing that this is happening".
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The White House's leak on the possiblity of a summit comes as Putin warned that a third world war "would lead to the end of civilisation" as he accused America of violating the nuclear balance.
Vladimir Putin takes the oath of office during a ceremony at the Kremlin in Moscow on 7 May 2018 after being re-elected as president.
Russia's very real conflicts also figured prominently.
The objective is to show Putin as involved in, and capable of solving, even the smallest of ordinary Russians problems, playing on an old Russian trope of the benevolent tsar whom peasants would petition for help.
"We decide pragmatically whether to cooperate with someone politically", Putin said when asked in the interview about United Russia's ties with far-right parties.
"They are temporary but we will keep them there while it is necessary and is required by our economic interests", he said. "The North Koreans see them standing before their eyes, so they would naturally demand some guarantees".
Trump a positive attitude to the possibility of direct dialogue with Putin. On several occasions, Putin noted several topics had been raised in past call-in programs.
"But I, of course, am thinking how a new young generation of managers will arise, responsible people, who will be in a state to take responsibility for Russian Federation". Putin asked during his annual phone-in show, referring to Canada and Mexico.
If Putin saw the prompt, it went unacknowledged.
The Austrian government has also done another major favor for Putin.