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: Is there any more vodka in that bottle ?
Person2:Hum , I think there's enough for one more , yes .
Person1: Marvelous . Pass it over . My name's George , by the way .
Person2:Nice to meet you , George . I'm Irene .
Person1: So Irene , what do you do ?
Person2:I'm in computing . I work for Macrohard .
Person1: Macrohard , eh ?
Person2:What do you do ?
Person1: I have my own company that designs computer systems .
informal