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: Come and sit down . Would you like a drink ?
Person2:Oh , yes please ! I'd love a gin and tonic .
Person1: Do you like olives ? Or would you prefer crisps ?
Person2:Oh , just olives please . What music is this ?
Person1: Do you like it ? It's Irish music .
Person2:It's great ! Where did you get the CD ?
Person1: Arm - I think it was in the CD shop in the Mall . Have you been there ?
Person2:Yes . I buy a lot of stuff from there . It's a good shop , isn't it ?
Person1: Yes . Hey , I've got some photos of our holiday in Ireland . Would you like to see them ?
Person2:Why not ? I'd love to !
Output:
informal