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: You wouldn't believe what happened to me today .
Person2:What ?
Person1: The teacher asked me to make a speech in English class and I wasn't prepared . He punished me by making me stand in front of the whole class . It was so embarrassing .
formal

Person1: Hello . I'd like to get a seat to New York City on a flight leaving sometime before this Friday .
Person2:I'm afraid Thera isn't any direct light before Friday . What about a non-direct one ? You have to make a change in Detroit .
Person1: Well , in that case , that's fine . I want a first class ticket on Thursday .
Person2:Would you like to pay in cash or by card ?
Person1: Cash , please .
formal

Person1: Mary , set your alarm clock for seven tomorrow morning .
Person2:Why ?
Person1: I'm going to take you to your school to register for classes .
Person2:That's right . I haven't done that yet .
Person1: You can choose classes that you like at the school office .
Person2:Really ?
Person1: Well , there are core courses and electives .
Person2:What do they mean ?
Person1: Core courses are ones that you must take . Elective courses are ones that you get to choose for yourself .
informal