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:       Did you go to the movie yesterday ?  
 Person2:Yes , I did .  
 Person1:        What did you think of it ?  
 Person2:I don't think much of the film .  
 Person1:        I think it is the worst one I have ever seen .  
 Person2:Oh , I'm not sure I agree with you . It was not a good one , but it was not the worst one . Actually , it wasn't too bad .  
 Person1:        I can't think the same .  
 Person2:What's more , some scenes were good , much fit for the children .  
 Person1:        I couldn't agree with you . 

informal