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:       Happy Anniversary , honey .  
 Person2:I thought you had forgotten .  
 Person1:        After the trouble I got into last year , no way .  
 Person2:Thank you honey , it means a lot to me . 

informal