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: If one is rich , is the happy ?
Person2:I don't think so.It ' s impossible to equate wealth and happiness .
Person1: Could I understand what you said as the poorest is the happiest ?
Person2:Of course not.Sometimes a poor man can be extremely miserable .
Example Output: formal

Example Input: Person1: Hi , Lander . What's wrong ?
Person2:I can hardly make ends meet these days .
Person1: Same here . I have't brought any new clothes for three months .
Person2:My income remains the same but prices just continue to rise .
Person1: True . The news says that there is a general increase in the price of daily necessities .
Person2:Definitely . I have to spend 300 yuan more on food every month .
Example Output: formal

Example Input: Person1: What did you do last night ?
Person2:I just stayed at home and watched TV .
Person1: Did you watch the Barcelona versus Madrid game ?
Person2:Yes , it was a very evenly matched game .
Person1: What were the results of the game ?
Person2:It ended in a tie .
Person1: What was the actual score ?
Person2:It was three all .
Person1: Really ? I thought Barcelona was going to win . They are a much better team than Madrid .
Person2:If Barcelona had played as they normally do , they should have won .
Person1: What happened ?
Person2:Their goalkeepers got injured after the first goal , but he kept on playing anyway .
Person1: That explains it .
Person2:How many more games are left this season ?
Person1: That was the last game before the playoffs .
Person2:When do the playoffs start ?
Person1: In a few weeks . Are you planning on watching them ?
Person2:Of course ! I really love watching football games on TV .
Person1: Me , too ! Do you want to come over and watch the next game at my place ? I'm planning on having a few people over to watch it together .
Person2:Sure , that would be great .
Person1: Ok , it's a date then !
Example Output:
informal