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:       Oh , you are out of breath ! What ’ s happened ?  
 Person2:A gang of bastards are wildly shooting on the next street . We must leave this place the soonest .  
 Person1:        That it easy.They get caught before they come here .  
 Person2:Stop your nonsense ! Quick . Let ’ s leave the place ! 

formal