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:       I'm reading an interesting report on Mars . 
 Person2:Oh , what does it say ? Does it say water could still exist under the surface of Mars ? 
 Person1:        Absolutely ! It says there is water on Mars buried beneath the surface . It's just a matter of how deep it is . 
 Person2:Then could the soil on Mars somehow be fertile enough to Groh simple plants ? 
 Person1:        The soil would need quite a bit of fertilizer to grow anything . And it would need to be protected from the UV radiation . 
 Person2:Actually , we are doing a project in school that involves landing a ship and staying on Mars for an extended period of time . Does NASA have any type of portable habitats that could be used to stay on the planet ? 
 Person1:        I'm not sure NASA has built any portable habitats for extended stays on Mars , but they have looked at various designs . 
 Person2:One of the most exciting things about Mars is that there could have bean life on it . What are your personal opinions on the life on Mars theory ? 
 Person1:        Well , I'm not really an expert in this area , but my understanding is that anything is possible . It's just that it is so hard to determine what went on 4.5 billion years ago . 
 Person2:But maybe there is a chance of gradually improving the surface and atmosphere of Mars so it may be inhabitable by humans . 
 Person1:        I'm skeptical . Mars is made of rocks containing silicon , iron , and various minerals . It also has an atmosphere of carbon dioxide . It is so different from what we have on earth , you know . 
 Person2:I'd still like to hope that some day we could set up a human colony there . 
 Person1:        But there are still other big problems we need to solve such as prolonged weightlessness , food storage , and a series of physiological effects . 

A: formal
****
Q:  Person1:       Good morning . Is this where I can get a library card issued to me ?  
 Person2:No problem , we have a short form right here ; just hand it to me when you are done .  
 Person1:        I'm done .  
 Person2:That looks great , but I will also need your driver's license or other form of I . D .  
 Person1:        Sure , here it is .  
 Person2:Well , this looks nice . Do you know how to use it ?  
 Person1:        I am pretty sure how to use it , but can you remind me ?  
 Person2:Of course , just remember that all of the needed information is on the card .  
 Person1:        I see .  
 Person2:Well , I hope you have a wonderful time on your library visits ! 

A: informal
****
Q:  Person1:       Do you like traveling ?  
 Person2:Yes . I ’ Ve just come back from Scotland .  
 Person1:        Where did you visit ?  
 Person2:I only had time to visit Edinburgh .  
 Person1:        How did you like it ?  
 Person2:It ’ s fantastic .  
 Person1:        Where did you go there .  
 Person2:I went to there on business .  
 Person1:        And do you have friend there ?  
 Person2:Yes , a lot of friends .  
 Person1:        You must enjoy yourself .  
 Person2:Yes . And I took many pictures . 

A:
formal
****
