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:       Now , madam , here is the Hotel .  
 Person2:What's the fare ?  
 Person1:        $ 15 .  
 Person2:The fare is different from the meter .  
 Person1:        Well , madam , the meter was not on at all . You didn't tell me .  
 Person2:But I thought it was . Anyway . I am in a hurry . Here is the money . 

formal