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:       Wake up sleepyhead.The sun is beginning to shine . What a lovely summer day !  
 Person2:Yeah , clearly blue sky.But it is a bit too hot for me . I don't like heat and humidity .  
 Person1:        It's not that hot . It's cooler than yesterday . Let's go swimming !  
 Person2:That's a thought . It's still early , and the beach isn't crowded at this time of the day . If we don't stay too long , we won't get sunburned .  
 Person1:        Yeah , sounds like fun . I can wear my new pink bikini .  
 Person2:There won't be anyone there to appreciate how cute you are .  
 Person1:        Who cares ! Well , the smart guys get there early . That's the kind of guy I want to meet . Let's go !  
 Person2:If you are going to husband hunting in a bikini , then I want to wear one , too .  
 Person1:        Ok , you could borrow one of mine .  
 Person2:Thanks , how about the green and black one ?  
 Person1:        No problem . Here it is . 

informal