You will be given a definition of a task first, then some input of the task.
In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details

customer: Hello. 
 agent: Hello. How can I  help you? 
 customer: I am Andrew Martinez. Can you help me booking a flight ticket from JFK to ORD? 
 agent: Your travelling dates please? 
 customer: I will start on July, 8 and return on July, 10. 
 agent: There is a flight with single connection, can I proceed  for booking in 1006 flight? 
 customer: Please proceed with the booking. 
 agent: Your booking is done in Delta airlines. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Output:
book