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 sort of things do you grow in your garden ?  
 Person2:I grow a variety of things , so that something is in bloom all year round .  
 Person1:        When is your garden at its best ?  
 Person2:It looks best in spring , when the plum and cherry blossoms are out . 

formal