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:       Hi . Bob ! We've been working hard at our lessons for a fortnight . So why don't we take it easy this weekend ?  
 Person2:Okay ! What do you suggest ?  
 Person1:        How about seeing a play ? I hear Hamlet is on at the National Theater .  
 Person2:Is that so ? Why not ?  
 Person1:        ( looking at a newspaper ) Oh , dear me ! There's no performance at the National theater this weekend . So we have to go to cinema instead .  
 Person2:What's on ?  
 Person1:        Let me see .. um . Gone With the Wind . It is on at six cinemas on Saturday night .  
 Person2:That sounds interesting . Which is the nearest ?  
 Person1:        Ah . The Royal , I think .  
 Person2:What time does it start ?  
 Person1:        Why don't we go to the 7:30 show ? It is convenient to us , I think .  
 Person2:But we won't have enough time for dinner .  
 Person1:        Do you want to go to the earlier or the later show ?  
 Person2:Ah ... I fancy going to the later show .  
 Person1:        Then , there's a 9:30 show .  
 Person2:That's Okay , I think .  
 Person1:        All right . 

informal