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:       Hey , did you hear the news ?  
 Person2:No , what's up ?  
 Person1:        Miss Yang is dating the manager who's married .  
 Person2:You're joking !  
 Person1:        No joke ! That's why she hasn't married yet . 

informal