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: Welcome , sir , what can I do for you ?
Person2:I want to buy some records .
Person1: Whose record do you want ?
Person2:Are there the records of Michael Jackson ?
Person1: His records have been sold out . The new copies will be available next week .
Person2:Oh . it's too late . Maybe I should go to other video stores to have a look .

Output: formal

Input: Consider Input: Person1: Mrs.Smith , time has stood still with you !
Person2:Thank you.You ' re partial .
Person1: I'm not flattering you.You ' re full of energy every day .
Person2:It's nice to hear that anyway .

Output: informal

Input: Consider Input: Person1: And the cover is great ! The colors are brilliant !
Person2:Give me a break . You don't care about the colors . You just like the hot babe on the cover .
Person1: OK , you got me . So , do you have a subscription ?
Person2:Of course . I'm currently the subscriber of 10 different fashion magazines .
Person1: So what do you do with all the out-dated issues ?
Person2:I guess I'm lending them to you ...
Output: informal