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: OK , Hello !
Person2:Hello !
Person1: Hi , what's your name ?
Person2:Yeah , my name is Nandu .
Person1: Nandu . Nandu , how do you spell you name ?
Person2:Yeah , my name is like N-A-N-J-U .
Person1: Oh , OK . That's a nice name , Nandu . And where are you from ?
Person2:I'm from Madras .

Output: formal

Input: Consider Input: Person1: Hi ! How are you going ?
Person2:Fine , thank you . How are you doing this morning ?
Person1: Not bad . How about you ? Haven't seen you for a long time .
Person2:Yes . I've been to New York . I got back only yesterday .
Person1: Did you enjoy yourself ?
Person2:Very much . New York is such a nice place . Shall I show you some photographs ?
Person1: Thanks , I like looking at photographs . How nice ! Oh , I'm afraid I must be going now . I've got an appointment . Have a good day .
Person2:You too . I hope to see you soon . Goodbye .
Person1: Goodbye .

Output: informal

Input: Consider Input: Person1: Did you hear what's going on downtown today ? All the orders from the factory are staging a demonstration in the streets . Not one of the two thousand employees showed up for work today , and they have gathered outside the city hall to demand better working conditions for all factory employees .
Person2:Wow , sounds chaotic ... two thousand people in the streets carrying picket signs and shouting slogans . What gave them the motivation to finally organize and call management on the substandard working conditions ?
Person1: I think they gained courage after the mayor's speech last week on equality and opportunity for all town citizens . Anyway , the sentiments have been brewing for quite some time . I mean , we all know the working conditions at the factory are quite horrendous .
Person2:So what kind of demands do they have ? What are they asking for specifically ?
Person1: They want raises and medical insurance , and I think they want to clean up the factory's safety hazards . That's probably the most important issue .
Output: formal