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:       I have a taste for something sweet . 
 Person2:What are you thinking ? 
 Person1:        I want some kind of dessert . 
 Person2:Well , what kind of dessert do you want ? 
 Person1:        I was thinking about ordering some kind of pie . 
 Person2:Do you know what kind you want ? 
 Person1:        I honestly don't know . 
 Person2:Did you want to know my favorite kind of pie ? 
 Person1:        What's your favorite kind ? 
 Person2:My absolutely favorite kind of pie is apple . 
 Person1:        That sounds really good to me right now . 
 Person2:I'm happy to help . 

informal