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: I've brought a little dog for Alice , girls usually like looking after pets .
Person2:Thank you , but Alice is only a visitor here . I don't know if she'll keep it .
Person1: To tell you the truth , the dog isn't my real reason for coming . I want to ask Alice if she'd like to be my girlfriend .
Person2:Really ?
[A]: informal

[Q]: Person1: So Kevin , what is your type ?
Person2:I like girls who like to have fun , and aren't too serious .
Person1: I agree . I like guys that can make me laugh .
Person2:That's true . Having a very serious boyfriend or girlfriend can be boring .
[A]: informal

[Q]: Person1: Excuse me . Have you got the time ?
Person2:My watch says half past five .
Person1: Does your watch keep good time ?
Person2:Oh yeah . It loses only a few seconds in the whole month .
Person1: Thanks a lot .
[A]:
informal