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:       Mum , I have something for you today .  
 Person2:What for ?  
 Person1:        Don't you remember ? Today is March 8th . It's Women's Day .  
 Person2:Oh . I've really forgotten it .  
 Person1:        Now , close your eyes . ( Mum closes her eyes and Steven puts the present in her hand . )  
 Person2:A silk scarf . I love it . Thank you very much . My lovely son .  
 Person1:        Happy Women's Day . I love you forever , Mum . 

informal