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:       Dalian is a beautiful city . Do you agree ?  
 Person2:I suppose I do .  
 Person1:        The climate here is pleasant .  
 Person2:They use said it  
 Person1:        This city is really comfortable to living .  
 Person2:It sure is  
 Person1:        No other city can match it . It's heaven .  
 Person2:Well , if you live in other as long enough you love them just as much .  
 Person1:        Maybe .  
 Person2:That's for sure . 

informal