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:       Is that true ?  
 Person2:I guess so . Now Anna's got four kids and another on the way .  
 Person1:        Wow . She looks good for having had that many kids . She's pregnant and wearing Prada !  
 Person2:That's Anna for you . She keeps up the image of the stylish Italian woman . Here she comes .  
 Person1:        She's glowing . It must be the pregnancy .  
 Person2:Yeah , or the expensive Italian facial treatments . 

formal