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: Yes , sir ?
Person2:I hate to complain , but this soup is too salty .
Person1: I'm very sorry , sir . I'll ask the manager to take care of this .

A: informal
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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
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Q: Person1: Hey Mike . What are you doing ?
Person2:Nothing much . What are you up to ?
Person1: I was just concerned about Sam . He hasn't been himself lately .
Person2:He took the civil service exam and failed .
Person1: That sucks . He must feel depressed .
Person2:Yeah . He's been sitting in his room everyday for the last 4 days .
Person1: Why don't we take him out ? We can try to take his mind off of it . In the least show him that we're there for him .
Person2:That's a great idea . Why don't you call him . I already talked to him a couple of times and it might be good for him to hear from somebody else .
Person1: Ok . I'll call you back after I'm done .
Person2:Sounds good .

A:
informal
****