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: Hello , is Jack there ?
Person2:Speaking .
Person1: Jack ! It ' s Rose here .
Person2:Hi , Rose . How ' s everything ?
Person1: Fine , thanks . I ' m having several friends over for dinner this Saturday . And I was wondering if you have the time to join us .
Person2:Sounds good . What time do you want me to come ?
Person1: Is six o ' clock okay ?
[A]: informal

[Q]: Person1: Would you please teach me how to use the computer ?
Person2:Sure , let's take a look at the menu first .
Person1: Do I have to turn on the computer ?
Person2:yes , we can look at the computer and computer menu at the same time . And this will help us understand both better .
Person1: What should I learn first ?
Person2:Right now I'll teach you to open files , save files and copy files . Are you ready ?
Person1: I am ready I am going to get , let's start !
[A]: informal

[Q]: Person1: Good evening , I have a reservation under the name of Tomlinson .
Person2:Ok I ' Ve found it . Checking out on the 27th ?
Person1: That ' s right .
Person2:Can I take a credit card for the deposit ?
Person1: Yes , sure . Also , I ' d like a non-smoking room please .
Person2:Certainly madam . Here ' s your key . Your room is on the 7th floor and on the left . Room 781 . Check out is at 12 noon .
[A]:
formal