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
One example: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Solution is here: no_reservation
Explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

Now, solve this: customer: Hi, I am Janet Taylor. 
 agent: Hello, may I know how best I can help you today? 
 customer: I want to book a flight ticket to Las Vegas with price under 200. can you please help me with it? 
 agent: Sure, we are rapturous to help you. May I know on what dates would you like to travel? 
 customer: Travel dates are 02/10 and 02/12. 
 agent: Help me with your depart and arrival airport codes. 
 customer: Airport codes are OAK-LAS. 
 agent: Ok, please wait a moment, let me search a flight for you. 
 customer: Ok. 
 agent: There is a flight found with AA airline of flight number 1000 and single connection flight. Shall I proceed? 
 customer: You can proceed with booking. 
 agent: Your booking has been done. 
 customer: Thanks for the help. 
 agent: Thank you for opting us.
Solution:
book