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's your favorite season ?  
 Person2:I like the freedom of summer with no school .  
 Person1:        Yeah , and all those fun summer sports and activities .  
 Person2:And I like the festivities of winter with Thanksgiving , Christmas and New Year .  
 Person1:        Oh , me too ! All the family getting together ...  
 Person2:And I really like the smells and colors of spring .  
 Person1:        I like the feeling then that school is almost over !  
 Person2:But I must say , if it were only for the weather , I like autumn most ! 

informal