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:       Rose , is this you ?  
 Person2:Yes , what is up ?  
 Person1:        This is Susan . Would you mind taking charge of decorating the office for our Christmas party ?  
 Person2:Sure .  
 Person1:        You can get your supplies upstairs from Mrs . Horn .  
 Person2:Will I be getting any help ?  
 Person1:        You can ask Frank and Cathy to help you . 

formal