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:       Sandy . Do you have a minute ?  
 Person2:Yes , John . I ’ m on my break . What ’ s going on ?  
 Person1:        Not much . I just wanted to see how you were . How ’ s married life treating you ?  
 Person2:Great , except for my mother-in-law ! Sometimes I think I married her instead of my husband ! How about you ? 

formal