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 ?  
 Person2:Hi Steve . This is Mike . What are you doing ?  
 Person1:        Oh , hi . I was just watching TV .  
 Person2:There's nothing to watch right now .  
 Person1:        I know . I was watching a re-run . I have nothing to do and I was bored .  
 Person2:Me too . Let's get together and do something .  
 Person1:        I'd like to , but I have to meet my parents in an hour for dinner . How about tomorrow ?  
 Person2:Yeah . Let's plan something tomorrow .  
 Person1:        Did you hear the weather forecast for tomorrow ?  
 Person2:I think it is going to be the same as today . Clear and sunny .  
 Person1:        That's great . We can do something outdoors then .  
 Person2:Are there any special events going on tomorrow ?  
 Person1:        Yeah . I think there's a live outdoor concert by the river tomorrow .  
 Person2:Oh yeah . I heard about that too . Let's go check it out .  
 Person1:        Do you know what time it starts ?  
 Person2:It starts at one PM .  
 Person1:        Let's meet for lunch at eleven thirty and afterwards , we can head over there .  
 Person2:Perfect . I'll see you in front of the apartment at eleven thirty . 

informal