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:       What's that ?  
 Person2:It's my new pendant . Do you like it ?  
 Person1:        Is that Hello Kitty ?  
 Person2:Yes , in a monkey suit . It's adorable !  
 Person1:        Is it real gold ?  
 Person2:Yeah . Two-toned , white and yellow . 

informal