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:       Now I'm sure we'll never get all our things back . They're so clever these criminals . What's the point of collecting beautiful things for other people to steal ?  
 Person2:I only wish it were this time yesterday .  
 Person1:        Think how happy we were . Now this.Things always go wrong .  
 Person2:Perhaps we ought to get dressed and have breakfast . We'd feel better .  
 Person1:        I don't feel like breakfast . I don't feel like anything . Why are we so unlucky ? It's as if there were a jinx on us .  
 Person2:Perhaps I'd better ring the police ...  
 Person1:        Yes . Of course . But what good will it do ? That man's miles away from here by now . In our car . 

formal