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 I ask for leave this afternoon ?
Person2:What is the problem ?
Person1: I had a headache this morning . I didn ' t pay attention to it . I thought probably it is because I didn ' t sleep well . But now it is getting worse and worse . I feel quite dizzy now and my eyes are somehow very light-sensitive . Maybe it is the migrated .
Person2:It is ok . You look really pale and red eyes . I suggest you go home immediately and have a good rest .
Person1: Thank you very much . I am sure good rest will do indeed . I don ' t have this too often .
Output:
formal