Definition: 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
Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: My name is Rebecca Thomas, I am planning to book a plane ticket from EWR to MSP. 
 agent: Sure Thomas, can I know the travel dates please? 
 customer: Sure, my trip dates are from 03/25 to 03/27. 
 agent: Ok, wait a moment please. 
 customer: Ok. 
 agent: There is a flight in Spirit airline with price 200, can I book it? 
 customer: Perfect, please proceed. 
 agent: Your ticket has been booked with flight number 1016. 
 customer: Thank you for your assistance. 
 agent: Thank you for approaching us.
Output:
book