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: Hi. 
 agent: Hello. 
 customer: My name is Jeffrey Thomas. 
 agent: How can I aid you today? 
 customer: I need to book a flight ticket from DFW to DTW. Please help me in booking a flight ticket. 
 agent: Sure, please provide your travel dates. 
 customer: My trip dates are from 05/30 to 06/01. 
 agent: Do you have any prefeences? 
 customer: I need a halt in between my journey. 
 agent: Ok, flight-1026 is avialble in Southwest airlines with single connection and the flight fare is 100. Can I proceed with the booking? 
 customer: Please proceed for booking. 
 agent: Your booking is confirmed and have a safe journey. 
 customer: Thank you for booking. 
 agent: Thank you for choosing us.
Solution:
book