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 really need to go shopping .  
 Person2:What do you need to buy ?  
 Person1:        I need to look for a new bedroom set .  
 Person2:Where are you going to go look for one ?  
 Person1:        I have absolutely no idea .  
 Person2:You don't know where you want to look for one ?  
 Person1:        No , I'm not sure where they sell nice bedroom sets .  
 Person2:Do you want to know where I got mine from ?  
 Person1:        Yes , because I love yours .  
 Person2:I purchased mine from IKEA .  
 Person1:        Is IKEA affordable ?  
 Person2:Not at all , but you get what you pay for . 

formal