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'.
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Question: Person1: When can we expect you for dinner ? Can you come tonight ?
Person2:Not tonight . I promised to go to a concert with my sister .
Person1: Well ... How about Friday then ?
Person2:That sounds fine .
Person1: Good . Shall we say seven o'clock ?
Person2:I'll be there . You're still a fabulous cook , aren't you ?
Person1: That'll be for you to decide . I've got a new dish that I want to try out on you .
Person2:I'm ready . I'll look forward to it all Friday !

Answer: informal

Question: Person1: what are you doing ?
Person2:I'm just trying to complete today's crossword puzzle . Whenever I get the time , I like to do the crossword puzzles in the paper .
Person1: you really like brains that make you think , don't you ?
Person2:I guess you could say that . What kind of games do you like ?
Person1: I guess the games I like the most are the ones that I'm good at !
Person2:Doesn't everyone ? Which games are those ?
Person1: Well , I like to play darts . Whenever I go to a bar , I usually play for a few hours .
Person2:Did you play a lot of games when you were little ?
Person1: My parents used to love to play checkers and dominoes . We used to have family tournaments every weekend .
Person2:Do you still like playing those games ?
Person1: Not at all . I never really did , to be honest . What about you ? Did your family used to play games together ?
Person2:Everyone in my family really enjoys playing card games .
Person1: Some of my friends play cards on the internet . Have you ever tried that ?
Person2:No , I prefer to play with people I know .
Person1: How about mah-jong ?
Person2:It's a popular game with some people , but I've never played it .
Person1: I thought everyone in your country were experts at mah-jong !
Person2:I hate to disappoint you , but unlike what most people think , we aren't all exactly the same !

Answer: formal

Question: Person1: Why didn't you tell me you had a girlfriend ?
Person2:Sorry , I thought you knew .
Person1: But you should tell me you were in love with her .
Person2:Didn't I ?
Person1: You know you didn't .
Person2:Well , I am telling you now .
Person1: Yes , but you might have told me before .
Person2:I didn't think you would be interested .
Person1: You can't be serious . How dare you not tell me you are going to marry her ?
Person2:Sorry , I didn't think it mattered .
Person1: Oh , you men ! You are all the same .

Answer:
informal