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:       What are you doing tomorrow ?  
 Person2:Nothing really .  
 Person1:        Let's watch a movie or something .  
 Person2:What's on these days ?  
 Person1:        I think they're playing Lord of the Rings  
 Person2:That sounds pretty good . Let's watch that .  
 Person1:        Where should we meet ?  
 Person2:How about at the subway entrance .  
 Person1:        Aright . I'll meet you there at one o'clock . 

informal