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'.

Input: Consider Input: Person1: Hi Mary , how's it going ?
Person2:Well , last night I had a big argument with Ann .
Person1: Terrible . It must be something serious . You two are such close friends .
Person2:Now that I look back at it , it wasn't that big a deal . I shouldn't have lost my temper .
Person1: Really ? What happened ?
Person2:It's just we've been planning to go the beach for a while , and we decided we could both make it this weekend . Then out of nowhere she called me up , said her boyfriend had made plans and that she need to cancel the trip . I was so angry when she told me that I said she didn't care about our friendship at all .
Person1: That's pretty harsh .
Person2:I know , but I was so upset . I mean , come on ! Does she have to do everything her boyfriend says ?
Person1: You know she probably feels just as bad .
Person2:Well , I think I was being a little selfish myself . I know they don't get to see each other very often .
Person1: Well , in that case I guess maybe you can be more understanding . You shouldn't let a trivial thing like this stand in the way of your friendship . After all you can go to the beach anytime you want .
Person2:Yeah , I'll call later to patch things up .

Output: informal

Input: Consider Input: Person1: What's wrong with him ?
Person2:His nose is out of joint because we forgot to invite him to the party .

Output: formal

Input: Consider Input: Person1: Who's singing in your home , Jim ?
Person2:It's Ellie and her friends .
Person1: Who's Ellie ?
Person2:She's my little niece.It ' s her birthday.They ' re singing " Happy Birthday " .
Person1: Oh , I see.how old is she ?
Person2:She's ten .
Person1: I suppose they're playing games .
Person2:Oh , yes.Ellie was playing games all day yesterday.By the way , Alice , when's your birthday ?
Person1: Today .
Person2:Today ?
Person1: Yes .
Person2:Well , imagine that ! How old are you ?
Person1: Eighteen.Some friends are having a birthday party for me tonight.Do you want to come ?
Person2:Very much.What time ?
Person1: About 6 .
Person2:I'll be at your house at about five thirty.Happy birthday .
Output: informal