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:       I ’ m sure it will be wet when we arrive .  
 Person2:Yes . I dare say it will be .  
 Person1:        It will be Sunday so I expected everything will be closed .  
 Person2:No . I don ’ t think that ’ s possible . Some places are sure to be open .  
 Person1:        But the bank should be closed so we shouldn't to be able to get any money .  
 Person2:Mmm , you may be right .  
 Person1:        Do you think we ’ ll need our overcoats ?  
 Person2:No . We couldn ’ t possibly .  
 Person1:        Why not ?  
 Person2:It will be summer . So it will be hot .  
 Person1:        Is that very likely in England ?  
 Person2:Yes . It could happen . 

formal