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: Charles , have you finished your homework ?
Person2:Not yet , Grandma , What's the matter ?
Person1: I want you to have a walk with me .
Person2:I'll finish soon .
[EX A]: formal

[EX Q]: Person1: We're leaving now .
Person2:Here's your bill .
Person1: Right . And would you please forward our mail to this address ?
Person2:Certainly .
Person1: Thank you . Goodbye .
Person2:Goodbye . Hope to see you again .
[EX A]: informal

[EX Q]: Person1: Look ! The girl is so beautiful and she is smiling at me . She is lovely .
Person2:I can't agree with you . She's pretty , but she always blows hot and cold .
Person1: What makes you think so ?
Person2:She's my sister , you know .
[EX A]:
informal