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 can I help you today? 
 customer: My name is Matthew Harris, I want to book a flight from LAS to visit my home at Houston. Can you book a flight for me? 
 agent: Sure, we are gleeful to help you. Can you please share your trip dates? 
 customer: I will fly on Jan 5th and return on Jan 7th. 
 agent: May I know your destination airport code please? 
 customer: My destination point is IAH. 
 agent: Do you have any halt in between journey? 
 customer: Yes, I need a halt. 
 agent: Is there any other specifications? 
 customer: No. 
 agent: Thanks for providing details, we found a connecting flight with AA airline in business class and the flight number is 1008. Is it ok for you? 
 customer: Yes, please proceed with booking. 
 agent: Ok, your ticket is reserved with a fare of 100. 
 customer: Thank you for helping me. 
 agent: Thank you for choosing us.
Output:
book