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: Hey ! What's up ?
Person2:Hi , John ! I haven't seen you for ages .
Person1: Yeah , I've been out of town .
Person2:So how have you been ?
Person1: Great ! Work is really busy now , but it's fun .

Output: informal

Input: Consider Input: Person1: Miss Gray , would you please type this report for me ?
Person2:Of course , Mr . Green .
Person1: Can you print it out before 12 o'clock ? I need it this afternoon .
Person2:No problem . I will do it immediately .
Person1: Please double space it and print it out on the laser printer so I can read it easily .
Person2:OK . Would you like this report done in a formal or informal style ?
Person1: Please type it in a formal style .
Person2:I see . Anything else ?
Person1: No , thanks .

Output: formal

Input: Consider Input: Person1: The poor girl is up to the eyes in study all the day .
Person2:Yeah , she has a lot of homework .
Person1: Today's children have not the chance to play , to make fun of them .
Person2:Right . So in some way we are happier .
Person1: Yeah , at least when we are children , we have not so much homework to do .
Output: informal