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:       Recently I have been getting headache and my eyes come to see focus properly .  
 Person2:When did you last time have your eyes checked ?  
 Person1:        Two years ago . At that time I had no problems . Now I can ’ t even make out something ten meters away .  
 Person2:Come over here . I will test your eyes . First cover your left eye like this , and when I point , please read the chart from the top , and go as far as you can telling me which way the “ E ” points .  
 Person1:        All right .  
 Person2:Good . Now the other eye .  
 Person1:        Well , this one is worse .  
 Person2:Never mind , just read as far as you can .  
 Person1:        I can only read the first three lines . 

formal