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:       Hurry up , Daniel , it's Barbie time .  
 Person2:All right , Sis !  
 Person1:        Come on , it's cool outside .  
 Person2:I really wish Mom and Dad were here with us .  
 Person1:        Hey , Daniel , what's your favorite weather ? Snowy or sunny ?  
 Person2:Me ? Er , I like hot weather , just like today .  
 Person1:        What ? Are you crazy ?  
 Person2:I like to watch Barbie sticking her tongue out .  
 Person1:        Ew , Danny , gross !  
 Person2:By the way , what's your favorite weather ?  
 Person1:        I love snowy , because it is very very romantic .  
 Person2:Look , is that Tom ? 

formal