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: Can ' t you remember the days when you had the hots for me ?
Person2:You tried to seduce me . I fell for you .
Person1: By the way , are you going to the concert tomorrow ?
Person2:I am just thinking of it . Maybe I ' ll go .
Output:
formal