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:       This is your room . What do you think of it ? 
 Person2:It ’ s quiet and clean . I love the color scheme . 
 Person1:        We have the room color designed for our guest . 
 Person2:I really like it here . 

informal