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: Thanks for inviting me to work out with you , Joan .
Person2:Don't mention it , let's go in .
Person1: Yeah , this place looks great . Wow , look at her , she can certainly get down , can't she ?
Person2:She sure can . Are you jealous , Leslie ?
Person1: A little , I wish I could do that .
Person2:You can ! With a little practice .
Person1: Look at him , he's buff .
Person2:I think he's hot too .
Person1: How do they all get in such tiptop shape ?
Person2:Exercised over and over . Exercise is a key .
Person1: That's it . I decided to turn over a new leaf . I'm going to exercise every single day .
Person2:Good for you , Leslie !
Output:
informal