Detailed Instructions: 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: Hi. I am Sandra Harris. 
 agent: Hello Sandra, how may I guide you? Welcome to our service. 
 customer: I am a Banker in Bank of America in Atlanta state. I will travel there from BOS - ATL. My travel dates are 07/25 and 07/27. 
 agent: Sure, may I know your destination airport code please for further process? 
 customer: It is given please check. 
 agent: Ok. The flight with connection is 1 of cost 300 with airline naming as Hawaiian and flight number 1018, shall I proceed to book this ticket? 
 customer: Please book this flight. 
 agent: Sandra, your booking has been confirmed. 
 customer: Thanks for the confirmation. 
 agent: You are welcome.
A:
book