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 a nice photo you ’ Ve taken !  
 Person2:I ’ m flattered , but really anyone else could do it .  
 Person1:        You have a real talent , Ellen !  
 Person2:I ’ m thinking of making an album , you know . 

informal