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:       Where to , sir .  
 Person2:To this place , please .  
 Person1:        Star Hotel . OK .  
 Person2:How long does it take to get to the hotel ?  
 Person1:        About 20 minutes .  
 Person2:Here's the hotel .  
 Person1:        How much is the fare ?  
 Person2:That's 10 dollars . 

formal