Definition: 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:  Person1:       It's a beautiful day , isn't it ?  
 Person2:Yes , isn't it .  
 Person1:        Do you now the temperature today ?  
 Person2:It's beautiful 75 degrees .  
 Person1:        How nice . I hope the weather will stay like this for the whole week . I'm going on the canoe trip this weekend .  
 Person2:Not a good plan . The TV weather forecast says the hurricane is coming this weekend , and the temperature will also drop to 66 degrees .  
 Person1:        What a nuisance ! Every time I plan to go canoeing or camping , a storm comes along . The sky gets dark , the wind starts to howl and the temperature drops.Well , I'd better stay home .  
 Person2:I never make any definite weekend plan until Friday morning . Then after listening to the weather temperature , I make my plans .  
 Person1:        That's smart . I'm going to start doing the same thing . 

informal