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:       What do you do in your spare time ? 
 Person2:During the weekend I often take the family out on short trips . 
 Person1:        That sounds interesting . 
 Person2:Yes , it helps me to relax . 
 Person1:        Do you have any hobbies ? 
 Person2:I like to paint .  
 Person1:        What kind of things do you paint ? 
 Person2:Mainly seascapes . 
 Person1:        What kinds of sports do you like ? 
 Person2:I like almost all sports , and I enjoy both playing and watching . I especially like tennis and mountain climbing . I was in the climbing club all through school . 

informal