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:       Good afternoon !  
 Person2:Good afternoon ! Sit down , please.How are you ?  
 Person1:        I'm very well , thank you.How are you ?  
 Person2:Very well too , thank you very much.Isn ' t it a lovely day ?  
 Person1:        Yes , it's beautiful , but it's also very hot .  
 Person2:Yes .  
 Person1:        What's the weather like in your country ?  
 Person2:Mm ... It's quite warm now .  
 Person1:        Where do you live ?  
 Person2:In London.Where do you live ?  
 Person1:        Here.Near this school . 

informal