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:       Are there pets allowed in this apartment ?  
 Person2:No dogs or cats or any other fur type animal , but other pets are allowed .  
 Person1:        What about a boa constrictor ?  
 Person2:Well . . . is that a pet ? Isn't that something from the zoo ?  
 Person1:        If I had one , could I rent this apartment ?  
 Person2:I was more thinking of nice little fish or frogs or turtles or a pet rock .  
 Person1:        What about a Gila monster ?  
 Person2:I'll tell you what , if your pet can fit in this little box and doesn't have fur , it is welcome here . 

formal