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:       Now the coals are just right . I can start grilling .  
 Person2:Here you go . I made up the burger patties for you .  
 Person1:        Thanks . Smell the hickory chips ? They give the meat a nice , smoky flavor .  
 Person2:I'll take over for a while to give you a break .  
 Person1:        Sorry . This is a one-man job . I've got the grill just how I like it , and I've made up my own special sauce .  
 Person2:Then I'll tell folks the food's ready . Come and get it ! I've always wanted to say that ! 

formal