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:       We scored six goals .  
 Person2:I don't believe it .  
 Person1:        And I score three of them .  
 Person2:You are not serious ?  
 Person1:        We had extra time of course .  
 Person2:I can believe that . 

informal