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
Input: customer: Hello. 
 agent: Hello. How may I help you out? 
 customer: Myself Jacob White, can you help me to book a flight ticket from LAS to LAX, so I can visit the college opening celebrations? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: Ok, the origin date is 03/19 and return date is 03/21. 
 agent: There is a flight with connection 1 and price 100, can I proceed? 
 customer: Ok, please book. 
 agent: Ok, your ticket has been booked with flight number 1003. 
 customer: Thank you for booking the flight 1003. 
 agent: Thank you for choosing us.
Output:
book