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:       Do you know that John isn't going to come back to our school ?  
 Person2:Really ? Why ?  
 Person1:        He had moved and held a party on July 1st .  
 Person2:It's a pity that I was traveling around Europe at that time .  
 Person1:        Even he's not coming back to school anymore , you still can call him and meet him on weekends .  
 Person2:You're right ! I will call him this weekend and meet him . 

informal