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: Congratulations on the new house !
Person2:Thanks ! We love it .
Person1: Well , you guys worked hard for it . It's really beautiful .
Person2:I'm just not looking forward to cleaning it !
[EX A]: informal

[EX Q]: Person1: But Sue is indeed beaut . Men can hardly resist such a knock-out .
Person2:Birds of feather flock together . You must be one of these men .
Person1: I know little of her . I only think she ' s pretty and intelligent . Of course , she ' s diligent , too .
Person2:That ' s enough for you to worship the ground she treats on .
[EX A]: informal

[EX Q]: Person1: Could you help me prepare for my presentation on Friday ?
Person2:I would love to help you prepare for your presentation .
Person1: I hate to ask you to do something like that .
Person2:This will not interfere with my work . I promise you that .
Person1: When could we get together ?
Person2:I could easily give you some time tomorrow night .
Person1: Would you like to meet me at the coffee house next door ?
Person2:Yes , and could you write down anything you might be having trouble with ?
Person1: I'll come prepared .
Person2:Goodbye until then . I promise you that you'll do well after we meet .
[EX A]:
informal