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:       Hi , dear , I've got your voice at last .  
 Person2:Hi , darling , I am thinking it is the time of your calling .  
 Person1:        Are you OK today ?  
 Person2:Quite good except thinking of you so much .  
 Person1:        So do I . You are a beautiful flower in my mind .  
 Person2:It's called love is blind , I think . 

informal