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: 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 .

A: informal
****
Q: Person1: Good afternoon . Reservations . May I help you ?
Person2:Yes , I'm calling from Tenga Company . I'd like to know if you have rooms available for the nights from October 8 to October 12 . We are going to have a business conference .
Person1: May I ask how many people there will be in the party ?
Person2:20 persons .
Person1: What kind of room would you like ?
Person2:Double rooms with twin beds .
Person1: A moment please , sir . Yes , I can confirm 10 rooms for those days .
Person2:Thank you . Is there a special rate for a group reservation ?
Person1: Yes , there is a 10 percent discount .
Person2:That is fine .

A: formal
****
Q: Person1: Steven , have you any friend in London ?
Person2:Yes , my old friend Hanson lives there
Person1: Are you close ?
Person2:Yes . He's one of my best friends . Our friendship formed at college . Why did you ask that ?
Person1: I'm going to London on business next week . But I know nothing about it .
Person2:I get it . You want to find a guide , don ' t you ?
Person1: Yes , Steven . You always know what I want .
Person2:Don ' t worry . I will call Hanson , and ask him to help you .
Person1: Thank you !

A:
informal
****