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

customer: Hello. 
 agent: Hello, how may I be at your service today? 
 customer: Can you please help me to book a flight from CLT to MCO? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: I want to depart on Nov 21 and need to return on Nov 23. 
 agent: Do you have any other specifications? 
 customer: I need a connecting flight. 
 agent: Please help me with your name for booking. 
 customer: Thomas Carter here. 
 agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1002. Shall I proceed with this flight? 
 customer: Ok, please proceed. 
 agent: Your booking is done. 
 customer: Thank you. 
 agent: Most welcome.
book

customer: Hello. 
 agent: Hello. 
 customer: Myself Angela Mitchell. 
 agent: Angela mitchell, how may I aid you? 
 customer: Due to some problems my trip was cancelled so can you please cancel my flight ticket? 
 agent: Sure, please give me a moment to check your ticket status. 
 customer: Ok, thank you for your response. 
 agent: Sorry, no reservation is available by your name. 
 customer: Oh! It's ok no problem. Thank you for your information. 
 agent: Thank you for reaching us.
no_reservation

customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I am Jeffrey Taylor. I am planning to attend a Music Festival in CO - DEN, could you please help me in booking a flight ticket from MA - BOS? 
 agent: Sure, may I know your planned journey dates? 
 customer: I want to fly on 01/27 and return on 01/29. 
 agent: Do you need halt in between your journey? 
 customer: No, I need a direct flight. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Sorry, there are no flights found with your given details. 
 customer: Not an issue. Thank you. 
 agent: Thank you for opting us.
no_flight