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 like to do in your spare time ?  
 Person2:I am a girl of many interests . I like dance , chess , collecting stamps , travelling and taking photos .  
 Person1:        What kind of dance do you like ?  
 Person2:I like rumba and tango .  
 Person1:        Great . I am not interested in Chinese chess . It is too difficult for me .  
 Person2:You can learn Chinese checkers or military chess . Both of them are much easier .  
 Person1:        OK , I will try . As for stamp , don't you think it is an expensive hobby ?  
 Person2:Yes , it is . But it is full of fun and knowledge . What about you , what do you like to do as hobby ?  
 Person1:        I like gardening . I take care of them everyday . I like those flowers and the swing in my garden . If the weather is nice , I would like to lie on the lawn .  
 Person2:Sounds pleasant . 

informal