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'.

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 .
formal

Person1: When can we expect you for dinner ? Can you come tonight ?
Person2:Not tonight . I promised to go to a concert with my sister .
Person1: Well ... How about Friday then ?
Person2:That sounds fine .
Person1: Good . Shall we say seven o'clock ?
Person2:I'll be there . You're still a fabulous cook , aren't you ?
Person1: That'll be for you to decide . I've got a new dish that I want to try out on you .
Person2:I'm ready . I'll look forward to it all Friday !
informal

Person1: I usually bowl with an eight ball . I like the control of a light ball . I can spin it more , so that the ball hooks .
Person2:Well . I like them a little heavier . I don't have as much control , usually bowling straight , but the extra momentum compensates for that .
Person1: Well , let's see which technique is better . I think I'll go up first ... Yes ! I hit a strike . I knocked them all down on my first bowl .
Person2:Well done . You got them all . You get 10 points and your next two bowls are added to this frame's score . I'II dry my ball off and try to knock them all down as well .
Person1: Good start . You knocked eight pins down . But you are left with a 7,10 split . Unless you can bowl a UFO-ball on this bowl , it is going to be impossible .
Person2:I certainly can try ... No ! It went straight through the wickets .
informal