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 Input:
Person1: Hi , may I speak to Ryan , please ?
Person2:This is Ryan you are speaking with . What can I do for you ?
Person1: Hi , Ryan , this is Malia , and I will not be coming to work today .
Person2:What is wrong with you ?
Person1: I have really bad poison oak and can ' t stop itching .
Person2:How long have you had it ?
Person1: I ' Ve had it a few days , but the rash really got bad last night .
Person2:How have you been treating it ?
Person1: I have some lotion that the doctor gave me , as well as an antihistamine .
Person2:That should work . I ' ll see you tomorrow when you return to work .

Ex Output:
formal

Ex Input:
Person1: Harry , do you like the opera ?
Person2:No , not really .
Person1: Why is that ? It is called real art .
Person2:Well , it's very expensive and they're usually singing in another language . That kind of gets on my nerves .
Person1: Yeah , that makes sense .

Ex Output:
informal

Ex Input:
Person1: I would like to return this pair of shoes .
Person2:Do you have a sales slip ?
Person1: Here it is .
Person2:Sorry , things on sale are not allowed to be refunded or exchanged .
Person1: Oh , but this pair of shoes are a bit too tight . Could I change them for something bigger ?
Person2:All right . Wait a minute .

Ex Output:
informal