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: Hello . I would like to buy some business cards .
Person2:Excellent . How many would you like ?
Person1: Two thousand would be fine .
Person2:You need to fill out this form , please .
Person1: All I want is the same thing on this card .
Person2:That will be no problem , sir .
Person1: ... Okay , I'm finished . Here's your form and my old card .
Person2:Very good , sir . Your order will be ready in one week .
Person1: Do you think you could finish it in three days ?
Person2:No problem , sir . But it will cost you extra .

Output: informal

Input: Consider Input: Person1: What have you been up to , Johnny ?
Person2:You know-sweeping , scrubbing , washing , drying , waxing , polishing ...
Person1: Wow , your grandma's really having a field day with you , huh ?
Person2:You got that right ... and my mom's still mad about what we did with the dishes .
Person1: You have all the fun , don't you ?
Person2:Listen , I'd better get back to the grindstone .
Person1: Sure thing , Johnny . Watch out for dishpan hands there , kid !

Output: formal

Input: Consider Input: Person1: Good morning , I am Monica . Are you Mr . White , the manager of finance department ? I am the newcomer and also working in the finance department .
Person2:Yes , that is me . Nice to meet you , Monica . Welcome on board !
Person1: Thank you . I am very happy to have my own office now . I ' Ve never had one before . It is very nice .
Person2:Well , we have nicer things than that in this company . You will find out soon .
Person1: Really ? What could that be ?
Person2:Well , I bet you will love them too . If you need help , just ask me any time . I am in the next door . You can also reach me through the extension 508 .
Person1: That is very kind of you . Thank you very much .
Output: informal