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 may I amend you? 
 customer: I am Robert Smith. 
 agent: Ok. 
 customer: I have a plan to meet my childhood friend in Houston, TX - HOU. Can you aid me for booking from Los Angeles, CA - LAX? 
 agent: Sure, I am gleeful to help you. Please mention your planned dates? 
 customer: Sure, I have a plan to travel on 11/14 to 11/16. 
 agent: How much you can afford for a flight ticket? 
 customer: I can afford up to 1000. 
 agent: Ok, are you looking for direct flight or connecting flight? 
 customer: I need a connected flight. 
 agent: Please wait, let me check and get back to you. 
 customer: Sure. 
 agent: Thanks for your time, I found a connecting flight from Hawaiian airline of fare 100 and flight number 1027. Shall I confirm? 
 customer: Sure, you can proceed for booking. 
 agent: Your flight ticket is processed. 
 customer: Thank you,. 
 agent: Thanks for opting us, have a good day.
Solution:
book