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:       Hi . are you new here ?  
 Person2:Yes . I moved here last week .  
 Person1:        I'm Steven , your neighbour .  
 Person2:I'm Charlie . Nice to meet you .  
 Person1:        Nice to meet you , too .  
 Person2:Since we live in the same neighbourhood , maybe we can help each other from now on .  
 Person1:        I guess so . I live next door but one , and hope you'll drop in now and then .  
 Person2:Thank you . I will . 

informal