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:       Hey Bob . Whatchy doing ?  
 Person2:I'm at home painting .  
 Person1:        I didn't know you paint . What type of painting is it ?  
 Person2:I enjoy oil painting . I learned it in one of my extra classes in college .  
 Person1:        That sounds so interesting . I wish I learned a hobby .  
 Person2:Hobbies are never too late to learn . They offer a variety of classes at the local community college . You should look into it .  
 Person1:        I think I will . Thanks for the info . 

informal