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 enjoy that new movie ?  
 Person2:That movie's just a lot of noise , same as Simon .  
 Person1:        Oh , what happened , Carole ?  
 Person2:I had to go by myself , he couldn't make it .  
 Person1:        What ? I met him just before I took off from Kitty's , he said he was coming .  
 Person2:Kitty's ? He sure gets around , doesn't he ?  
 Person1:        Looks like it . So how did he handle it to ?  
 Person2:His excuse was familiar . He said his car died again .  
 Person1:        I think that's a bunch of nonsense . It seemed ok to me .  
 Person2:I know . Last week he gave me a lie about being too busy .  
 Person1:        Doesn't sound promising .  
 Person2:Well , I think it's the time to pull the plug .  
 Person1:        If you want I'll let him know if I run into him .  
 Person2:Thanks anyway , but I'll do it , Rebecca . Let's get to class . 

informal