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:       Robin , what are you going to do tomorrow ?  
 Person2:Bob and I plan to play hockey in the morning .  
 Person1:        And later ?  
 Person2:Well , in the afternoon , after a long nap , we ’ ll go yachting with Nora .  
 Person1:        It seems that you will have a nice day tomorrow .  
 Person2:How about you ? What are you going to do tomorrow ?  
 Person1:        I have a lot of work in the office and a lot of chores in the house.How I envy you , Robin ! 

formal