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 Patrick Hall. 
 agent: Hello, how can I assist you today? 
 customer: My dream is to study in New York university.So, to join in university I need a connecting flight from San Francisco, SFO. 
 agent: Ok, may I know your travelling dates please? 
 customer: I will go on 10/18 and return on 10/20. 
 agent: What is your origin airport code for this journey? 
 customer: I have mentioned it already. 
 agent: Please wait for a moment. May I know your destination airport code? 
 customer: My destination is EWR, New York. 
 agent:  Please wait for a moment. 
 customer: Sure. 
 agent: Flight-1022 by Hawaiian airlines is available for you with 1 connection at the price of 200, shall I book it for you? 
 customer: Ok, you can go with booking. 
 agent: Booking done. 
 customer: Thanks for assisting me. 
 agent: Thank you for reaching our services.
A:
book