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 haven ' t met Bob for years . How is he ?
Person2:He has been keeping bach after divorce .
Person1: He would have recovered from the stress and got married again .
Person2:Once bitten , twice shy . He said he would rather keep bach than to live in disgust .
[A]: formal

[Q]: Person1: How is your business going ?
Person2:Business couldn't be better .
Person1: Really ? Maybe I should work for you .
Person2:Welcome . I could use the help .
[A]: informal

[Q]: Person1: How are you ?
Person2:I ' m fabulous .
Person1: What can I help you with ?
Person2:I need to make a withdrawal .
Person1: How much are you withdrawing today ?
Person2:I need $ 300 .
Person1: What account would you like to take this money from ?
Person2:Take it from my checking account .
Person1: Here ' s your $ 300 .
Person2:Thank you so much .
Person1: Will you be needing anything else ?
Person2:That ' s it for today .
[A]:
informal