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:       Do you have any hobbies ? 
 Person2:Yes . I like gardening . 
 Person1:        Oh , that's interesting . Do you have a garden ? 
 Person2:Yes , follow me . Here it is . 
 Person1:        Your garden is really lovely . 
 Person2:Thank you . 
 Person1:        Do you take care of them everyday ? 
 Person2:Yes , I do . 
 Person1:        Don't you feel dull ? 
 Person2:I don't . I like the work . 

informal