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, I am Robert Collins. 
 agent: Hello, Robert Collins. How may I be your helping hand? 
 customer: jI would like to attend rock band event in Carnegie Hall at New York, JFK. 
 agent: Fine. 
 customer: Can you help me to book a ticket? 
 agent: To reserve a ticket, help me with your boarding point. 
 customer: Detroit, MI - DTW is my boarding point. 
 agent: Any specifications do you have? 
 customer: Please check under 1000 fare. 
 agent: Please let me know your travelling dates. 
 customer: My travelling dates are 07/09 and 07/11. 
 agent: Thanks for your details. 
 customer: OK. 
 agent: You have a Delta airline of price 100 with 1 connection of 1024 flight. Shall I make it to reserve? 
 customer: Yes, please reserve it. 
 agent: Booking has been done. 
 customer: Thank you. 
 agent: Thank you for picking us.
Solution:
book