Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. If the conversation begins with a question, label it '1' otherwise '0'.
Input:  Person1:     How did your vacation go ?  
 Person2:  I traveled the Three Gorges .  
 Person1:      What about the trip ? Do you enjoy yourself ?  
 Person2:  Yes , we had a good time . The trip was terrific . We toured the Three Gorges by boat . Its realty exciting !  
 Person1:      Did your boat float down the river ?  
 Person2:  Yes . There are many places where the gorge is very narrow , with steep cliffs on both sides .  
 Person1:      Sounds dangerous .  
 Person2:  Yes , but we have life jackets . And we got a real kick out of that .  
 Person1:      What a thrilling trip ! 

1