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'.

Input: Consider Input: Person1: Who ' s this ? your girl-friend ?
Person2:No , it ' s my sister .
Person1: How old is she ?
Person2:She ' s 18 .
Person1: She is tall ?
Person2:Yes , she is .
Person1: And she is thin , isn ' t she ?
Person2:Well , just a little thin .

Output: formal

Input: Consider Input: Person1: Have you any tour route to Budapest ?
Person2:Yes , I have , sir . How long are you going on vacation ?
Person1: About 2 weeks .
Person2:I recommend you this route . We call it golden routes for the sightseeing spots .
Person1: Well , will you offer me any reduction since it's a out-of-season tour ?
Person2:Of course , we will , sir .

Output: formal

Input: Consider Input: Person1: Wedding rings !
Person2:Oh , no ...
Person1: Aren't they cool ? I like the settings .
Person2:Jen , is there someone you're not telling me about ?
Person1: No . I just like looking at wedding rings , OK ?
Person2:Women are such dreamers .
Person1: These are specially designed for the year 2000 !
Output: informal