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: He has come to life in the end .
Person2:Oh , thank God . We all felt frightened by the bad new about him .
Person1: Yes . Fortunately , an ambulance passed in the nick of time , and we got him away to hospital .
Person2:Right . Unless , who know what will happen .
Person1: Wish him to be healthy soon .

Output: informal

Input: Consider Input: Person1: Did your eye doctor prescribe you contact lenses ?
Person2:No , I ' d like to know something about contact lenses .
Person1: Oh , I see . We have both hard and soft contact lenses . They are very popular , but a little more expensive than ordinary glasses .
Person2:I have found I ' m short-sighted recently . I need to wear glasses . As a student , it ' s better for me to wear ordinary glasses instead of contact lenses .
Person1: We have many kinds of glasses here . Which frames do you like best ?
Person2:I think the square-shaped ones will be the best for me .
Person1: What about this pair ? They are the ' in ' things now in optical wear . Try them on .
Person2:They fit me very well . I like them .
Person1: Please go to receive optometry first over there .

Output: informal

Input: Consider Input: Person1: I like pop music very much .
Person2:What ?
Person1: I said I like pop music very much.It ' s so lovely .
Person2:Is it ?
Output: informal