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: Hello, I am Williams Hernandez. 
 agent: Hello,. How may I help you? 
 customer: I want to visit EWR from my hometown MSP, can you help me with single connection of flight? 
 agent: Ok. Please provide your journey dates? 
 customer: My depart is on 12/09 and return on 12/11. 
 agent: Ticket is available with flight number 1011, price is 200. Flight connections is 1 with airline Southwest. 
 customer: OK, proceed with booking. 
 agent: Ticket is booked. 
 customer: Thank you for the help. 
 agent: Thanks.
A:
book