You will be given a definition of a task first, then some input of the task.
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'.

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 .
Output:
informal