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'.

[EX Q]: Person1: Do you think that climate change is responsible for the recent floods ?
Person2:It could be . There are floods in this country almost every year , but in recent years they have been more widespread and more frequent .
Person1: It seems that the climate in this country is changing .
Person2:The summers are hotter . The last three summers have been the hottest for the past 200 years . There have also been stronger winds .
Person1: I think that the changing climate is a sign that we are causing too much damage to the environment .
Person2:I think you ' re right . Climate change naturally over time , but I think that human activities are speeding up the change . I wish that government would join together and try to resolve the problem .
Person1: Me too . If we don ' t do something soon , It might be too late .
[EX A]: formal

[EX 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 .
[EX A]: informal

[EX Q]: Person1: What can I do for you , madam ?
Person2:I'd like to buy a toy car for my son .
Person1: How about this one ?
Person2:It looks nice.How much is it ?
Person1: They're three hundred dollars .
Person2:Oh , I'm afraid it's too expensive.Can you show me something cheaper ?
Person1: OK , This one is one hundred and twenty.It ' s the cheapest here .
Person2:OK , I'll take it.Here ' s the money .
Person1: Thank you very much .
[EX A]:
informal