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: Hi , Jason !
Person2:Hi , Linda . I have two concert complimentary tickets . Will you go with me tonight ?
Person1: With the greatest pleasure ! Where is the concert held this evening ?
Person2:It will be held at the Central Music Hall .
Person1: What is on the program ?
Person2:It ' s a piano solo . I'm fond of piano , you know .
Person1: Hah ! OK . Let ' s go together !
Person2:Let ' s meet at the park at 6:00 .
Person1: See you then .
[EX A]: informal

[EX Q]: Person1: Happy Birthday , Mary !
Person2:Thank you .
Person1: Here is a gift for you . I hope you like it .
Person2:What a lovely dog ! How did you know I love this ?
Person1: I had my own ways of finding out . It's a secret . You look so beautiful today . Your new shirt goes well with your skirt .
Person2:Maybe you don't believe it , but it was made by my grandmother .
Person1: Really ? It looks so nice .
Person2:Thank you . Please have a cup of tea .
Person1: All right .
Person2:How about some fish ?
Person1: No , thanks . I've had enough . Now , Mary , before you blow out the birthday candles , you have to make a wish . After that , you may cut the cake .
Person2:OK , let me make a wish ... Do you want a big piece of cake ?
Person1: No , just a small one . Next let's sing ' Happy Birthday ' to Mary .
Person2:It is very kind of you . I'm so moved by you .
[EX A]: informal

[EX Q]: Person1: How do you celebrate Thanksgiving in the US ?
Person2:Well , Thanksgiving is family event.So on Thanksgiving , family members will get together and enjoy a big Thanksgiving dinner . Kids will have lot of fun .
Person1: Do you say prayers before dinner ?
Person2:Yes , we do . It is an exciting moment .
Person1: What is the biggest fun for you on Thanksgiving ?
Person2:For me ? The football games of course , I love football games .
[EX A]:
informal