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'.

Example Input: Person1: How do you spend your free time ?
Person2:I read or go swimming , go shopping , usually . I run or play tennis or do something else like those to get some exercises to keep fit .
Person1: Are you introverted or extroverted ?
Person2:I wouldn't call myself extroverted . Sometimes , I enjoy being by myself very much . But other times , I like sharing activities with others too , especially during these last few years .
Person1: What kinds of sports do you like ?
Person2:I like almost all sports , and I enjoy both playing and watching . I especially like tennis and mountain climbing .
Person1: What kind of personality do you think you have ?
Person2:Well , I approach things very enthusiastically , I think , and I don't like to leave something half-done . It makes me nervous-I can't concentrate on something else until the first thing is finished .
Example Output: formal

Example Input: Person1: Lisa , I'm home .
Person2:How was your day ?
Person1: Pretty good . I've made a few friends already .
Person2:Anybody I know ?
Person1: Well , Pam Franklin lives next door to us . By the way , can I go to her house this Saturday ?
Person2:Of course . You didn't have to ask me .
Person1: That's what Pam said .
Person2:Just don't stay out too late .
Example Output: formal

Example Input: Person1: Oath , I think I broke my leg .
Person2:Here , sir , sit down in this wheelchair .
Person1: Thanks .
Person2:The doctor will be with you in a moment . I just need to ask you a few questions .
Person1: All right .
Person2:Name , age and date of birth , please .
Person1: John Taylor , 32 , May 23 , 1970 .
Person2:Health insurance company and policy number ?
Person1: I don ' t have it .
Person2:What ?
Person1: I don ' t have health insurance .
Person2:Well , this is going to be a very expensive broken leg , Mr . Taylor .
Person1: Ohhhh !
Example Output:
informal