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:       Here comes the birthday cake .  
 Person2:Wow , what a lovely cake .  
 Person1:        Be sure to blow out all the candles in one puff .  
 Person2:Oh , they all went out ! Did you make a wish ?  
 Person1:        Yes , but I doubt if I get it . I've never get it .  
 Person2:Better luck this time . 

informal