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'.
--------
Question: Person1: That girl looks very attractive , doesn ' t she ?
Person2:Do you think so ? I don ' t like girls who look like that . I like girls who aren ' t too slim . If you like her , go and talk to her .
Person1: I ' d like to , but there ' s her boyfriend . He ' s very broad-shouldered .
Person2:He ' s huge ! He must go to the gym to have a well-built body like that .
Person1: Do you prefer tall girls or short ones ?
Person2:I don ' t mind , but I like girls with long hair .
Person1: We have different tastes . I like girls with short hair . I like tall girls - probably because I ' m so tall myself .
Person2:Have you ever dated a girl taller than you ?
Person1: No , never . I don ' t think I ' Ve ever met a girl taller than me ! Have you gained weight recently ?
Person2:Yes , I have . Perhaps I should go to the gym , like that girl ' s boyfriend .
Person1: I'm getting a bit plump myself . Perhaps I ' ll go with you .

Answer: formal

Question: Person1: Hi , charlie , are you busy this evening ?
Person2:Sorry , I'm afraid that I've got plans tonight .
Person1: What are you doing ?
Person2:I'm going to my parents ' house for my father's birthday .
Person1: How old is he today ?
Person2:It's his 50th birthday .
Person1: Well , wish him a happy birthday for me .
Person2:Sure thing . What are your plans for the evening ?
Person1: I was just thinking of going to a movie tonight .
Person2:Well , if you can wait until tomorrow night , I'll go with you then .
Person1: Sorry , I've got people coming over tomorrow night .
Person2:Sounds like this weekend just isn't going to work out for us .
Person1: Sounds that way . Maybe some other time then ?
Person2:Sure.Hey , I'm sorry , but I've got to get going .
Person1: Yeah , me , too . It's about time I made a move .
Person2:Say hello to your friends for me .
Person1: Likewise . See you later .
Person2:Bye !

Answer: informal

Question: Person1: I have a suggestion . Why don't we go to a ETV and sing ?
Person2:A ETV ? Are you serious ? ETV ?
Person1: Yes , why not ? Don ' t you like ETV ?
Person2:I don't know . I never went to one .
Person1: Never ? Really ? I'm surprised .
Person2:Many Americans have never gone to a ETV . It ' s not an American thing to do .
Person1: But there are a lot of Kts in this town . There's one just two blocks from here .
Person2:OK , let's go .

Answer:
informal