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:       Have you ever been to any other country ?  
 Person2:Pity I haven't . If I can afford it , I'll certainly take a trip abroad .  
 Person1:        That's also my dream .  
 Person2:How about going to italy next summer vacation ?  
 Person1:        Why not ? 

formal