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:       Honey , I've got good news for you .  
 Person2:What is it ?  
 Person1:        You are going to be a father .  
 Person2:What ? Do you mean that you are pregnant ? Is it true ?  
 Person1:        Yes . We'll have our baby soon .  
 Person2:Oh , dear , I'm so happy .  
 Person1:        Me , too . 

informal