Q: 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 may I help you? 
 customer: I am Pamela Lopez want to visit Alcatraz Island at San Francisco, can you book a ticket on 03/30 and 04/01? 
 agent: Please share your airport codes. 
 customer: Sure, I want to travel from DFW to SFO. 
 agent: Delta airlines with 1 connection is providing service on your route. 
 customer: Ok, please make sure that the price of the flight is within 1000. 
 agent: Pamela, your ticket is booked as per your requirements. 
 customer: Ok, thank you. 
 agent: Thank you, for choosing us.
A:
book