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:       What are the branches of Operations ?  
 Person2:Operations is made up of Manufacturing , Materials , Shipping and Distribution etc .  
 Person1:        It seems that it is a key department for providing materials and transportation .  
 Person2:Yes , it is . 

formal