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'.

[Q]: Person1: Hey , Zina . You're here early today .
Person2:Yeah , I'm going to be making phone calls all day . What a blast .
Person1: I just wanted to say thanks for putting us on the map so fast . I appreciate it .
Person2:Save it , Vince . After I put my first million in the bank , I'll say you're welcome .
Person1: Fair enough.Keep up the good work .
[A]: informal

[Q]: 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 .
[A]: formal

[Q]: Person1: We ' re going to the movies . Will you join us ?
Person2:I ' m very sorry I can ' t .
Person1: Why not ?
Person2:I ' m afraid I have some business to attend to .
Person1: Then would you like to have lunch with us ?
Person2:I ' d love to but I have to help John with his math problems right now .
Person1: Would you like me to give you a lift ?
Person2:No , thanks . His home is not far and I can walk there .
Person1: Come on . It ' s no trouble at all .
Person2:Ok , thank you .
[A]:
informal