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:       Are you okay ? 
 Person2:No . 
 Person1:        What's wrong ? 
 Person2:I got robbed ! 
 Person1:        By who ? 
 Person2:Some guy on the street just mugged me . 
 Person1:        Are you hurt ? 
 Person2:No , he just stole all of my things . 
 Person1:        That's crazy . 
 Person2:I need to go to the police station . 
 Person1:        Do you want me to take you ? 
 Person2:That would be great . Thank you . 

informal