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 would you like for dessert ?  
 Person2:What do you have ?  
 Person1:        I have apple pie , ice cream , chocolate cake and fruit cocktail .  
 Person2:Can I have apple pie with ice cream ?  
 Person1:        Of course . I made the apple pie this morning , so it ’ s lovely and fresh .  
 Person2:I love your home-made apple pie.It ’ s delicious.Can I have another glass of lemonade as well ?  
 Person1:        Sure.Can you get it yourself , it ’ s in the refrigerator .  
 Person2:Ok.Would you like a drink too ?  
 Person1:        Yes , I ’ ll have an ice tea.You see it next to the lemonade .  
 Person2:Are you having any dessert ?  
 Person1:        I ’ ll have apple pie too , but without ice cream . I have to watch my weight . 

informal