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'.

Example Input: Person1: Is your lady beautiful ? Since I came here from the country , I've not seen her close . Tell me , is she beautiful ?
Person2:Thomas , if I could write with the beauty in her eyes , I was born to look in them and know myself .
Person1: And , her lips ?
Person2:Her lips ? The early morning rose would wither on the branch if it could feel envy .
Person1: And her voice like a lark's song ?
Person2:Deeper , softer , none of your twittering larks . I would banish nightingales from her garden before they interrupted her song .
Person1: Oh , she sings too ?
Person2:Constantly . Without doubt , and plays the lute . She has a natural ear .
Example Output: informal

Example Input: Person1: Ms . : Do you have a question , Mary ?
Person2:No . That's not why I raised my hand . I need to go to the ladies ' room .
Person1: Ms . : Let me give you a hall pass for it .
Person2:What's a hall pass ?
Person1: Ms . : With a hall pass , you can go to the ladies ' room or wherever you need to go during class time .
Person2:I see .
Person1: Ms . : If a teacher stops you in the hallway , just show him or her the pass .
Person2:Or else I'll get into trouble .
Person1: Ms . : That's right .
Example Output: formal

Example Input: Person1: Hoo , I'm getting tired , Jeanine , been a long day .
Person2:I'm not quitting yet . You know my favourite slogan , don't you ?
Person1: Yeah , I know . Shop till you drop .
Person2:Right !
Person1: I'm getting a little short on cash . Let's just window shop a little .
Person2:Ok .
Person1: Hey , Jeanine , get a load of that . It's beautiful .
Person2:Ahahah , and I thought you were tired .
Person1: You know .. I have a weakness for long dresses .
Person2:It sure looks special , looks expensive too .
Person1: Sure does . Hey , can I sponge a little cash of you ?
Person2:Don't worry , Marian , I've got you covered .
Person1: Thanks , Jeanine , you are a real pal . Let's go in .
Example Output:
informal