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: Where are you going this weekend ?
Person2:I have no idea . Maybe I will sleep for the whole day .
Person1: So boring ! Shall we go out for a picnic with my friends ?
Person2:Sounds interesting . Who are the other people ?
Person1: Fred and David , my college class mates and Rachel .
Person2:Gorgeous ! What should I bring on that day ?
Person1: Your tent and enough food and water .
Person2:You mean , we can do many other things after the picnic , right ?
Person1: We can go fishing , chatting and camping .
Person2:What are we waiting for ? Come on !
Person1: Don't hurry . Wait for my call .
Output:
informal