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 there any more vodka in that bottle ? 
 Person2:Hum , I think there's enough for one more , yes . 
 Person1:        Marvelous . Pass it over . My name's George , by the way . 
 Person2:Nice to meet you , George . I'm Irene . 
 Person1:        So Irene , what do you do ? 
 Person2:I'm in computing . I work for Macrohard . 
 Person1:        Macrohard , eh ? 
 Person2:What do you do ? 
 Person1:        I have my own company that designs computer systems . 

informal