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: Just make yourself at home .
Person2:Thank you . You are cooking up a storm .
Person1: Wouldn't you like some more chicken ?
Person2:No , thank you . I'm afraid I can't take in anymore .
[EX A]: informal

[EX Q]: Person1: There must be something weighing on your mind . What is it ?
Person2:Dad , I lost mum's necklace . I'm afraid she will scold me .
Person1: Don ' t worry . I'll buy a new necklace as same as the old one .
Person2:It is so kind of you , Dad .
[EX A]: informal

[EX Q]: Person1: OK . I'd like to have everything gift-wrapped , please .
Person2:I'll give you the boxes . You can then go to our gift-wrapping department .
Person1: Is it on this floor ?
Person2:It's on the first floor , to the right of the main entrance .
Person1: Thank you .
Person2:Have a nice holiday !
Person1: You , too . Thanks for your help .
[EX A]:
informal