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:       hello , Deva , how are you ? 
 Person2:can't complain . What about you ? 
 Person1:        not bad . Have you heard Wendy divorced her husband ? 
 Person2:I've heard . She looks quite depressed . 
 Person1:        Yes . They used to be joined at the hip . 
 Person2:I heard they were just married for 5 months . 
 Person1:        yes , she said they couldn't communicate well with each other and they often argued over trivial things . 
 Person2:yeah . Mixed marriage is tempting but crisis-ridden . 
 Person1:        you said it . You know , they fall in love at first sight and quickly jumped into marriage . 
 Person2:maybe they were just attracted to each other but too different to be married . 
 Person1:        yeah . We Chinese have quite different lifestyles and values from foreigners . 
 Person2:definitely . That's why many cross-cultural marriages end in divorce . 
 Person1:        we've heard so much about Chinese film stars divorcing foreigners . 
 Person2:that's true.Just hope Wendy can recover from the pain of divorce soon . 

formal