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:       So Alex , you ’ re off to the Olympic stadium then ?  
 Person2:Yes , I should get there just in time for the women ’ s 400m relay .  
 Person1:        Wow , that should be really exciting , especially with so many famous athletes there .  
 Person2:Yes , I ’ m also going to watch the triple jump and the high jump .  
 Person1:        Well have a good time . Get me some autographs if you can .  
 Person2:Ok , I ’ ll try my best . 

informal