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:       Whose handset sounds so beautiful 
 Person2:Mine . It's My Heart Will Go On , the theme song of Titanic . Isn't it of strong character ? 
 Person1:        Are you able to compose music ? 
 Person2:No , not yet . 
 Person1:        Who composed it for your ? 
 Person2:You needn't ask anyone . You can get on line to search for one . 
 Person1:        Can I get on line to search one , too ? 
 Person2:Yeah . Web sites provide many melodies for handsets like my ERICSSON . 
 Person1:        What about my SIEMENS ? 
 Person2:Numerous . It's time that everybody is particular about personality.Find one and change yours . 

informal