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:       Can you believe me ?  
 Person2:Sure .  
 Person1:        Please count on my love .  
 Person2:I will .  
 Person1:        I'll be yours through endless time .  
 Person2:I see . And I'll always be devoted to you .  
 Person1:        Thank you . I know I've nothing to offer you , but I'll never give you reason to cry .  
 Person2:I'll never hurt you ; I'll never lie .  
 Person1:        My love will grow , like a river to flow .  
 Person2:It can't be dry , and can't die .  
 Person1:        I don't know whether we are in a dream .  
 Person2:Aha , Aha ... 

informal