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:       Has your family lived here for long ?  
 Person2:Five and a half years . We moved here on the first of November .  
 Person1:        You have a fantastic view .  
 Person2:Yes . I love living here .  
 Person1:        Look ! You can see the village way down in the valley .  
 Person2:Yes . It ’ s a lovely view . 

informal