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:       How do your spend your time after work or in vacation ?  
 Person2:In my spare time , I am fond of traveling and I always take a trip with my family .  
 Person1:        But traveling is an expensive hobby , isn't it ?  
 Person2:You are deadly right . 
Output:
informal