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:       hello , Jason , there is going to be a screening of Final Destination 3 at our campus cinema tomorrow . I plan to go to see it .  
 Person2:is it a horror movie ?  
 Person1:        yeah , I love horror movies . Would you like to go with me tomorrow ?  
 Person2:no way . I will be scared out of my wits .  
 Person1:        that's funny , I didn't know a big fellow like you could be so soft and timid on the inside .  
 Person2:Hey , how could you like to taste my fist ?  
 Person1:        alright , all joking aside , what kinds of moves do you like ?  
 Person2:Um , let me see , romance , comedy . documentary , action , science fiction , animated and so on .  
 Person1:        that is to say , you like all genres except for horror movies .  
 Person2:yeah . It seems like we don't speak the same language as far as movies are concerned .  
 Person1:        not quite . I also greatly enjoy romance and comedy .  
 Person2:the Notebook is this type of movie .  
 Person1:        really ? I haven't heard of it .  
 Person2:well then , this could be a nice opportunity to enjoy it together . I bet you'd love it .  
 Person1:        Ok . I can't wait to see it . Let's go ! 

informal