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:       Daddy , I love this Happy Farmhouse . It's really fun .  
 Person2:Great . But no talking , now . Don't forget that you are on a ladder . Take care !  
 Person1:        But you are holding it for me . Nothing to worry about . I trust you . Oops , what's that ?  
 Person2:Don't touch it with your stick . It's a bumble bees ' hive . Get down the ladder . Be quick .  
 Person1:        What would happen if they started attacking you ?  
 Person2:You can get killed . No kidding . Remember , never stir up a hive .  
 Person1:        I see . Why do people come all the way here to pick apples by themselves and take them home ? Isn't it easier for them to buy the apples in the supermarket ?  
 Person2:It's for fun . And also , the apples here are Green Food .  
 Person1:        Come on , daddy . You can see that people only pick the red ones .  
 Person2:Silly boy . Green Food means the plants grown without using any chemicals , fertilizers , and pesticides .  
 Person1:        Oh , then what would happen if there were pests ?  
 Person2:I heard they used ultraviolet lamp to kill pests .  
 Person1:        Cool ! Well , let's go over there to join mom . I want to tell her all about the special pests-killing method . 

informal