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:       Hey , you wanna see a movie tomorrow ?  
 Person2:Sounds like a good plan . What do you want to see ?  
 Person1:        How about Legally Blonde .  
 Person2:Ah , my girlfriend wanted to see that movie . I have to take her later so I don't want to watch it ahead of time . How about The Cube ?  
 Person1:        Isn't that a scary movie ?  
 Person2:How scary can it be ? Come on , it'll be fun .  
 Person1:        Ok . I'll give it a try .  
 Person2:That's the spirit . I'll see you tomorrow after class .  
 Person1:        Ok . See you tomorrow . 

informal