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'.

Ex Input:
Person1: Hi , my name ' s Karl . My wife and I are moving in next door .
Person2:Hello , Karl . I ' m Chuck Jones . We ' re going to be neighbors .
Person1: I ' m happy to meet you . It seems everyone in town is so friendly .
Person2:This is a small town , and we like to be neighborly . We know everyone who lives around here .
Person1: Well , I ' m from Chicago . There few people take the time to get to know their neighbors .
Person2:So , tell me , Karl , why did you come all the way to Minnesota to live ?
Person1: We wanted to live in a more peaceful community and have more space . Another reason is , we can afford to buy a home here , but we can ' t in Chicago !

Ex Output:
formal

Ex Input:
Person1: Kim ! I'm here ! I brought all my old maternity clothes plus Dave and Alice's baby clothes !
Person2:It's a little early for those , isn't it ? I still have eight months to go ...
Person1: Believe me , the time will fly by ! Before you know it , you'll be changing diapers ! You have to start preparing !
Person2:I thought we could turn the upstairs study into a baby room . What do you think about lavender ?
Person1: I'll be back tomorrow with my work clothes and a gallon of lavender paint ! You just sit back and relax !

Ex Output:
informal

Ex Input:
Person1: Hi Jackie . You don't look too well . What's going on ?
Person2:It's nothing . I'm just a little stressed out .
Person1: Why ? What's stressing you out ?
Person2:School . Since I was working part time , I had a difficult time keeping up with class . Now that we have exams coming up , I'm totally freaking out .
Person1: The best thing to do is study as much as you can . I'm sure you'll do alright .
Person2:I hope so . I guess I won't be sleeping for the next 3 days . That's what it'll take .
Person1: I have to study for an exam too . Why don't we study together . We can encourage each other .
Person2:That will be great .

Ex Output:
informal