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: What did you think of the film ?
Person2:I liked it . I thought it was great .
Person1: Yes , I liked it , too . Did you like the acting ?
Person2:Yes . I thought it was excellent . Didn't you ?
Person1: Not really . I thought it was disappointing .
Person2:It's a nice cinema , isn't it ?
Person1: Do you think so ? I don't like it very much . I found it rather uncomfortable .
informal