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:       Just make yourself at home . 
 Person2:Thank you . You are cooking up a storm . 
 Person1:        Wouldn't you like some more chicken ? 
 Person2:No , thank you . I'm afraid I can't take in anymore . 

informal