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'.

Person1: Good morning . Mrs.Smith .
Person2:Good morning ! Can you help me , please ? I'm looking for some books for my mother .
Person1: Well , what kind of books does she like ?
Person2:She's very fond of detective stories ?
Person1: I see . Has she read any detective stories ?
Person2:Oh , yes !
Person1: Do you know if she's read this one ?
Person2:I'm not sure , but she probably won't remember if she has ! She's very forgetful !
Person1: Ah ! She has a bad memory . How old is she ?
Person2:She's eighty-seven .
Person1: I suggest you take this book . It's very exciting .
Person2:Thank you . That's a good idea.she likes exciting books . Can you suggest another one ?
informal

Person1: T he nineteenth of June is my birthday . I'm planning to have a small party . Could you come ?
Person2:Happy birthday to you ! I'd really love to come , but I'm not sure right now . I'll try to make it.Thank you for your invitation .
informal

Person1: Well , how did you enjoy your seaside trip ?
Person2:It was fun , I tell you .
Person1: Tell me about it , will you ?
Person2:Well , we drove through the valley on our way there in the morning . It was a magnificent sight !
Person1: Did you stop at the Fall for some pictures ?
Person2:Sure , we wouldn't miss that for anything . After that , we took a short cut to the park . There was very little traffic , so we got there in less than an hour .
Person1: You were lucky then .
Person2:Yeah , we spent the whole morning under the tall trees . We had our picnic there , too .
Person1: What did you do after that ?
Person2:We went for a swim in the sea . That was the biggest part of the day . Just look at my nice tan !
Person1: So you must have had a busy and enjoyable day yesterday .
Person2:Yes , you are right . And I was so tired out that I fell asleep on the way back . My muscles are still stiff from the swim yesterday .
informal