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:     Hello , Sir . What can we do for you today ?  
 Person2:  Hello . I've been asked to come and see about something called L / C ? What is it exactly ?  
 Person1:      L / C stands for ' letter of credit ' . This is necessary for trade between two countries . A Letter of Credit is quite literally that — a letter addressed by the buyer's bank to the seller's bank stating that they could vouch for their good customer , the buyer , and that they would pay the seller in case of the buyer's default . Nowadays , it's sometimes used for domestic trade too .  
 Person2:  So the other party could be across the world or just on the other side of the street ! 

1