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
See one example below:
Problem: 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: 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

Problem: customer: Hello. 
 agent: Hello. How can I help you today? 
 customer: I am Gary Hill. 
 agent: Ok. 
 customer: I need to reach Pick Place Market in Seattle on a meeting with manager. Can you please book a flight ticket from DFW to SEA? 
 agent: Sure, may I know the travelling dates of your journey? 
 customer: Sure, my travel dates are 08/07 and 08/09. Please check with connection 1. 
 agent: Please wait for  a while. 
 customer: Sure, take your time. 
 agent: Based on your requirement there is one flight matching with your request has the flight price 100 in Spirit airline. 
 customer: That's great. 
 agent: Can I proceed with this booking? 
 customer: Please confirm it. 
 agent: Your ticket has been confirmed with the flight 1014.Have a safe journey. 
 customer: Thank you for your help. 
 agent: You are welcome.
Solution:
book