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:       Hi ! Tom . Fancy seeing you here It's a nice party isn't it ?  
 Person2:Yeah . Well it's quite some days since we were together last summer.How is everything going ?  
 Person1:        Quite well . I got my MA degree two weeks ago .  
 Person2:Congratulations ! 

informal