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:       Mom , did you feel the earthquake this afternoon ?  
 Person2:Oh , that scared me .  
 Person1:        The breaking news just reported some houses were destroyed by the earthquake .  
 Person2:Oh , dear ! How ruthless !  
 Person1:        Do you think we can donate some clothes and food for the victims ?  
 Person2:Why not ? That's a good idea to help them . 

informal