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
Q: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: Joseph Green here, I am planning to book a flight ticket to MCO from BOS. Can you please do it for me? 
 agent: Sure, can I know the travel dates please? 
 customer: Sure, I am looking for a flight on 08/26 and 08/28. 
 agent: Ok, wait a moment please. 
 customer: Ok, take your time. 
 agent: There is a flight in Hawaiian airline with price 200, can I book it? 
 customer: Fine, please reserve me a seat. 
 agent: Your ticket has been booked with flight number 1008. 
 customer: Thank you for the help. 
 agent: Thank you for approaching us.
A:
book