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'.

[EX Q]: Person1: What can I do for you ?
Person2:I want to get a package of cigarette .
Person1: Have you a taste for this kind ?
Person2:No , this kind of cigarette is too strong for me , I desire a mild one .
Person1: What about this ?
Person2:It suits my taste , I'll take it . Do you have lighters ?
Person1: I have a lot of them .
Person2:Show me the one made of plastic .
Person1: OK , here you are .
Person2:Thank you .
[EX A]: informal

[EX Q]: Person1: What do you base our grades on ?
Person2:All of your coursework is important , including everything from attendance and homework to all of your test results for the semester .
Person1: Does the final count the most ?
Person2:All of it is important ; please just do your best at all times .
Person1: How do you total our scores ?
Person2:The final and mid-term are twenty percent each ; homework , attendance , and quizzes are the rest .
Person1: What if we are out sick ?
Person2:Make sure you contact me as I only allow one unexcused absence .
Person1: How can we know if we are doing OK during the year ?
Person2:Your grade will not be a surprise ; you will know what you need to work on .
[EX A]: formal

[EX Q]: Person1: What are your working hours ?
Person2:Eight to twelve in the morning , two to six in the afternoon .
Person1: Much better than mine .
Person2:What are your hours ?
Person1: Mine aren't fixed . Sometimes I do the day shift , sometimes the night shift .
[EX A]:
formal