Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       You are married to a foreigner , aren't you ? So what's it like ? 
 Person2:Well , in the first year of our marriage , we had great difficulties in getting along . The things that are important to me are not important to him . We had a lot of conflicts . 
 Person1:        Yeah , I know what you mean . The first year of any marriage is difficult for all couples , not to mention two people from different cultures . 
 Person2:Now we have a two-year-old boy . We're very happy that he's healthy and smart . 
 Person1:        Oh , so he's half Chinese and half American . That's unusual . What languages does he speak , then ? 
 Person2:Right now he speaks mostly English , and he can say a few Chinese words . But he will learn in the future . 
 Person1:        What does he look like ? Can people tell ? 
 Person2:Yes , people surely can . He's whiter than the Chinese kids , and his hair is a little blonde . My husband says his eyes are very Chinese though . 

informal