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. 
 customer: I am Ruth Hill. 
 agent: How can I help you? 
 customer: I am planning to travel from SFO to JFK, can you help in finding a flight for me? 
 agent: Can you please tell your travelling dates? 
 customer: My date of journey is on 06/10 and I will be back on 06/12. 
 agent: I found a flight with 1 connection and ticket price is just 200. Shall I proceed with it? 
 customer: Proceed for booking with that flight. 
 agent: Your reservation is confirmed with flight 1008 and it is Frontier airline. 
 customer: Thank you for your help. 
 agent: Thank you and have a nice day.
Solution:
book