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:       Let's go see pandas ! The news said that two pandas arrived at the zoo last week .  
 Person2:Great ! I would like to see cute pandas , too .  
 Person1:        How can we get there ?  
 Person2:We can take the MET and get off at the Zoo Station .  
 Person1:        OK ! Let's go .  
 Person2:( At the zoo ) Wow ! This zoo is really huge .  
 Person1:        Yes , you can find hundreds of various animals here . It is the biggest zoo in Taiwan .  
 Person2:Look at the map . It has different areas , such as marine lives , mammals , polar animals and insects .  
 Person1:        Where can find the pandas ? I think we are here to see the pandas .  
 Person2:We have to go to the mammal area . We are at the gate right now . We need to go straight from here and turn left and go along to the end and make anotherleft turn .  
 Person1:        It should take at least 20 minutes to get there . Are there any shuttle buses running place to place around the whole zoo ? 

informal