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:       Is anything the matter , sir ?  
 Person2:Yes , it's my steak .  
 Person1:        What's wrong with it , sir ?  
 Person2:It's too raw . I wanted mine well done , but this one here is almost medium .  
 Person1:        I am sorry you didn't enjoy it , sir . I will return it to the kitchen and bring you one that is well cooked . How is your steak this time , sir ?  
 Person2:Very good . It's done just right this time , thank you .  
 Person1:        I am glad you enjoy it . I will tell this to the chef . Would you like some more beer ?  
 Person2:Yes , please give me another Calsberg .  
 Person1:        Can I bring you some dessert ?  
 Person2:No , thank you . I've had enough .  
 Person1:        How about some coffee or tea then ?  
 Person2:Yes , I will have a cup of coffee . 

informal