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 Kathleen Evans. 
 agent: Hello, how can I best assist you? 
 customer: I am planning to attend a wedding of my friend sister's, help me in booking my flight ticket  from NY-JFK. 
 agent: Sure, can you please provide your journey dates? 
 customer: My travelling dates are from 02/09 to 02/11. 
 agent: May I know your destination? 
 customer: My destination airport code is IL-ORD. 
 agent: We found a flight with Spirit airline having a halt and fare is 200. Shall I proceed with booking? 
 customer: Please proceed with booking. 
 agent: Your ticket has been confirmed. 
 customer: Thank you for your assistance. 
 agent: Thank you for opting us.
A:
book