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:       Did you see Victor on Wednesday , Wendy ? 
 Person2:Yes . We went for a walk in the woods near the highway . 
 Person1:        Wasn ’ t it cold on Wednesday ? 
 Person2:Yes . It was very cold and windy . We wore heavy wool sweaters and walked quickly to keep warm . 
 Person1:        It ’ s so nice and quiet in the woods . 
 Person2:Yes . Farther away from the highway it was very quiet and there were birds and squirrels everywhere . We counted over twenty squirrels . 
 Person1:        It sounds wonderful . Did you take lunch with you ? 
 Person2:Yes , we bought veal sandwiches . We stopped around twelve , and we ate and watched the squirrels , but it was too windy to sit long . It was a very nice walk , anyway . 

informal