A vice-president of an American software company introduced himself to a group of Korean partners and added, "You may just call me John." Although this verbal cue shows the underlying reality that Americans place a high value on informality and equality, it needs adaptation. Why?

customs, hierarchies, and class structure of Korean culture has to be respected

Explanation:

The way that you are seen in a country for your behavior might be a good one, but that same behavior might cause a completely different reaction and impression in different cultures. Korean culture and American culture have significant differences and they must be taken into account.