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 can't even imagine you snorkeling !  
 Person2:Well , you'll see . With this new watch , I can go anywhere , do anything .  
 Person1:        OK , Bond .  
 Person2:No , really . Look . It's got a double time zone setting .  
 Person1:        So you can always keep two times at once ?  
 Person2:Yep . I just can't decide what two cities to choose ...  
 Person1:        The only two times you need are I'm late and I'm really late . 

informal