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:       I hear you're moving to New York . 
 Person2:Yes , I found a very good job down there . 
 Person1:        Well , we'll certainly miss you in Boston . 
 Person2:I'm going to miss you folks , too . 
 Person1:        Let's keep in touch . 
 Person2:OK . I'll drop you a line as soon as I get there . 

informal