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'.
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Question: Person1: It was great meeting you .
Person2:Me too .
Person1: Maybe we can meet again sometime ?
Person2:Of course , but I'll have to go now .

Answer: informal

Question: Person1: Excuse me , Sir , do you know what time it is ?
Person2:Oh , it ' s almost eleven twenty .
Person1: Thank you .
Person2:You ' re welcome . The rain is quite heavy , isn ' t it ?
Person1: Yeah . I was in a hurry and I forgot my umbrella today .
Person2:I have one . We could share it . Which way are you going ?
Person1: Oh , that ' s very kind of you . I am going to the Garden Hotel .
Person2:I am going there , too . We can walk together .
Person1: Sure .

Answer: formal

Question: Person1: Lucy , what are your priorities when buying a car ?
Person2:I guess the first thing is the price , the second is the size , and of course the color will play a role too . But I have to be honest . It is our today ' s responsibility to take care about our environment . Therefore , I will also pay attention to the fuel consumption of the car . You know , the rise in gasoline prices is huge . So I would rather to consider a smaller car with smaller engine . For which I can also save some tax . Last of the list , I also consider the safety .
Person1: What about the environmental factors ?
Person2:Well , I do prefer the lower emission cars as long as it doesn ' t cost much . Some environmentally-friendly cars are really expensive .
Person1: Sure they are . Some hi-tech devices are built in to make sure they pollute less . Some of these green cars have not become standard . So the production costs are still high . But anyway , we should make efforts to start with .

Answer:
formal