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'.

Q: 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 !

A: informal
****
Q: Person1: I can't believe Mr . Fro didn't buy it . Who does that guy think he is anyway ? Bill Gates ?
Person2:He had a lot of nerve telling us our ads sucked .
Person1: Time to order . Balista , today I want a skinny triple latte .
Person2:When did you start worrying about your weight ?
Person1: I'm not . I just don't feel like drinking whole milk today . Why ? Do you think I'm fat ?
Person2:No , Jess , chill out !

A: formal
****
Q: Person1: Mr . : For tomorrow , read pages 12 to 20 . Then do exercises one through ten on page 21 .
Person2:Do we have to type out our homework ?
Person1: Mr . : No . You only do that when you write reports .
Person2:Is there anything else ?
Person1: Mr . : For those of you who don't have a calculator , get one .
Person2:We are allowed to use a calculator in class ?
Person1: Mr . : Yes . By the way , review today's notes this evening . We may have a small quiz tomorrow .

A:
formal
****