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:       Two people were robbed last night near the park .  
 Person2:Again ? The area around the park is too dark at night . There should be more lights there .  
 Person1:        I am afraid of the dark . I don ’ t feel safe in the dark . I feel someone is hiding in the dark to attack me .  
 Person2:Your feelings might be right . You should never walk alone there at night . It is too dangerous .  
 Person1:        I Know . And you should be more careful , too . 

informal