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:       Did your wife give birth yet ?  
 Person2:Yeah . She's a healthy beautiful girl .  
 Person1:        Congratulations . How is your wife doing ?  
 Person2:She is tired , but getting a lot of rest now .  
 Person1:        That's good to hear .  
 Person2:I'm just glad there were no complications .  
 Person1:        If your wife and baby are both happy , what more can you ask for ?  
 Person2:It's been a week , and I haven't slept that well .  
 Person1:        That's normal for anyone with a newborn .  
 Person2:Yeah , but it's so hard . I have to work , and then go home and take care of my wife and the baby . I'm going to get sick at this rate .  
 Person1:        You'll get used to it . After everything stabilizes , you can regain your health .  
 Person2:That's true . I should make sure my wife and baby stay healthy during this time . 

informal