They also wanted to keep both sides from an uncomfortable chance encounter, after North Korea said it had no intention of meeting with USA officials.
The officials, who spoke on condition because they were not authorized to discuss the US approach publicly, also denied that Pence had been blindsided by the seating arrangement - with the North Koreans in the row behind him, allowing Kim Yo Jong to be easily pictured in profile next to the vice president.
UN Secretary-General Antonio Guterres urged North Korea's ceremonial head of state Kim Yong Nam to engage in dialogue on ending the nuclear crisis during a brief exchange in South Korea, a UN spokesman said Friday. Before the 1988 Seoul Olympics, North Korea blew up a jetliner.
"He said it would create chaos and confusion in South Korea".
In a rare show of unity, athletes from South and North Korea will march together under a "unification flag".
However, just a block from the Olympic a few dozen protestors raged against the presence of North Korean athletes and officials at the Games, tearing up a North Korean flag as emotions ran high.
North Korean leader Kim Jong Un speaks during the Second Plenum of the 7th Central Committee of the Workers' Party of Korea (WPK) at the Kumsusan Palace of the Sun, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang October 8, 2017.
He continued (in an accent that did not sound particularly North Korean): "So let's start talking and stop with all the missiles and everything else".
Jari happy with Lagos Marathon course
So in the next two to three years, I believe with that support, we would get to where we want to be", the Governor said. Former Bolton Wanderers talisman, Okocha, however, made a decision to take part in the 2018 Lagos marathon competition.
Moon asked him to greet the other dignitaries at the event and Pence did, shaking the hands of everyone at the VIP table except for Kim Yong-nam.
The actual Trump and Kim are not as friendly in real life.
"I probably have a very good relationship with Kim Jong Un", Trump said.
This was not supposed to be, as some in Seoul grumble, the "Pyongyang Games", a play on the North Korean capital's phonetic similarity to Pyeongchang.
Some local media reported system problems, including the Games website and some television sets, were due to a cyberattack but Sung said it was still too early to determine whether hackers had attempted to damage them.