Given the task definition and input, reply with output. 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: Listen , Christine , you can not afford another day off . You ' Ve called in sick five times in the last three weeks .
Person2:I know , Mr . Douglas . But I am really sick .
Person1: Well , I want a note from the doctor on this one . And , to be honest , if this continues , we may not be able to employ you here .
Person2:I understand , sir . I ' ll bring a doctor ' s note in tomorrow . I am sorry , Mr . Douglas .
informal