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'.

Example Input: Person1: Don't just stand outside . Come on in .
Person2:Yeah .
Person1: This is Alex . Remember ? This is Sean .
Person2:Nice to meet you guys .
Person1: Over there are Stacy and Rebecca . We're all on the school's tennis team .
Person2:Who's that guy who's handing out beer to everyone ?
Person1: That's my boyfriend Matt . Isn't he cute ?
Person2:He sure is !
Person1: Come on . I'll introduce you two .
Example Output: informal

Example Input: Person1: Do you like traveling ?
Person2:Yes . I ' Ve just come back from Scotland .
Person1: Where did you visit ?
Person2:I only had time to visit Edinburgh .
Person1: How did you like it ?
Person2:It ' s fantastic .
Person1: Where did you go there .
Person2:I went to there on business .
Person1: And do you have friend there ?
Person2:Yes , a lot of friends .
Person1: You must enjoy yourself .
Person2:Yes . And I took many pictures .
Example Output: formal

Example Input: Person1: Wow , that terrible movie is finally over . Next time I ' m picking the film , because I don ' t want to end up seeing a chick flick .
Person2:Well you should have picked , in the end you always complain about everything .
Person1: Not everything , just this film . Even the title is ridiculous , and it ' s so long , those are the two and a half most wasted hours of my life , so much so that I ' m thinking about asking them to give me my money back .
Person2:I ' m thinking of taking you back home . I thought we could have a nice evening , but you ' re always so negative .
Person1: I ' m only complaining about a movie that I could have rented or bought and then thrown in the garbage .
Person2:You see , that ' s what I ' m talking about , I can ' t stand your sarcastic jokes anymore .
Person1: Next time , go with your gay friend who is more in touch with his feelings .
Person2:Well he ' s more of a man than you are ; at least he appreciates love stories .
Person1: Love stories ? More like one-night-stands .
Person2:Don ' t criticize Mario or else I ' ll start on those fat , drunk friends of yours , they ' re no saints .
Person1: My friends ? Fat ? What about those whales you call friends ?
Person2:You ' re unbearable , you can walk home , I ' m leaving .
Example Output:
formal