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:       Hey , the pool's open now ! 
 Person2:As of today it is . Memorial Day marks the end of the school year and the beginning of summer . 
 Person1:        So it's time for the kids to get outdoors ... 
 Person2:... and for us to get tans in our new bikinis . 
 Person1:        Not this Taiwanese girl . We don't like to get suntans . 
 Person2:That's smart these days with all the news on skin cancer . Hey , there's everybody ! We made it ! 

informal