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: I am checking out . Here is the key to my room .
Person2:Thank you . I'll just print out your receipt , and then you're free to go . Here you go !
Person1: Thanks .
Person2:If you don't mind me asking , how did you enjoy your stay at New York Hotel ?
Person1: This hotel could use some insecticide , but my time in New York was thoroughly delightful .
Person2:That's very honest of you . Rest assured that this hotel will have no insects next time .
[EX A]: formal

[EX Q]: Person1: I can't believe it , I had faith in Bob and he let me down .
Person2:I know what you mean .
Person1: Really ?
Person2:Yes , he did the same to me .
[EX A]: informal

[EX Q]: Person1: I love that vase .
Person2:Do you really like it ?
Person1: Yes , it looks perfect .
Person2:It wasn't very expensive either .
Person1: That's amazing !
[EX A]:
informal