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's the matter with you ? You look so upset and tired .
Person2:My father failed in business .
Person1: Oh , that's really tough .
Person2:Maybe it is the most difficult period of my family have experienced .
Person1: I can understand . By the way , is there anyway I can help ?
Person2:No , not now . I have found a part-time job . So perhaps I can help my family to come over the difficulties .
Person1: Oh , that's so great , bless you ! if you need me , I'll always be there .
Person2:Thank you .
Output:
informal