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'.

Ex Input:
Person1: Excuse me , sir ? I just need a little bit more information . Could you tell me your telephone number and mailing address ?
Person2:Sure . My number is 545-8897 , and I live at 908 Mulbury Street .
Person1: That ' s 545-8897 and your mailing address is 908 Mulbury Street . The zip code is 20310 , right ?
Person2:That ' s right .

Ex Output:
formal

Ex Input:
Person1: In my country , we go to school from 8 o'clock in the morning until five in the afternoon .
Person2:Five days a week , too ?
Person1: Actually , five and a half.On Saturday , we have classes only in the morning .
Person2:Gosh !
Person1: That's too much for us really .
Person2:Where are you going now ?
Person1: I'm going to try to find out where the school is located .
Person2:When do you start school ?
Person1: I'm going to register right now .
Person2:That's good .

Ex Output:
informal

Ex Input:
Person1: It's a lovely day , isn't it ?
Person2:Yes , the weather sure is nice today .
Person1: I love it when the weather is like this.Why don't we sit down outside and have our lunch ?
Person2:That sounds like a good idea.The sky is clear , the sun is shining and there's a nice cool breeze , so it is not too hot .
Person1: I really miss the change of seasons like we have in Colorado ; but I must admit , this sure is a nice spring day .
Person2:Hey , this spot in the shade looks really comfortable .
Person1: Okay.Hey , is that a dark cloud over there ? Do you think it will rain after all ?
Person2:I don't think so . I say the weather report last night , and it said the weather should be fine all day .
Person1: If the weather stays nice perhaps we can go to the beach this weekend.It ' s been a while since I've not really gotten some sun .

Ex Output:
informal