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: Are you okay ?
Person2:No .
Person1: What's wrong ?
Person2:I got robbed !
Person1: By who ?
Person2:Some guy on the street just mugged me .
Person1: Are you hurt ?
Person2:No , he just stole all of my things .
Person1: That's crazy .
Person2:I need to go to the police station .
Person1: Do you want me to take you ?
Person2:That would be great . Thank you .
informal