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:In summer I go hiking , and in winter I ski .  
 Person1:        Do you mind if I come along sometime ?  
 Person2:No , not at all . Glad to have you . 

informal