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 assist you today? 
 customer: I am David Adams. Can you help me to book a flight ticket from CLT to LGA? 
 agent: Sure, can you confirm your travel dates? 
 customer: My travelling dates are 23 and 25 of June. 
 agent: Do you have any another specifications? 
 customer: I need a connecting flight. 
 agent: United Airlines providing the ticket for you, the fare is 100 and connection limit 1. Would you like me to make the booking now? 
 customer: Please proceed to booking. 
 agent: Your ticket reservation done with the flight number 1010. 
 customer: Thanks for helping me. 
 agent: Welcome, have a great journey.
book

customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: I have to change my reservation due to my planned my trip got postponed. So please help me with that. 
 agent: Sure, may I know your name? 
 customer: Thank you. Please check my reservation with my name Rebecca Gonzalez. 
 agent: Please wait a moment. 
 customer: Sure, take your time. 
 agent: Sorry, there are no active reservations to change your trip. 
 customer: Oh! It may not be booked properly. Anyway, thank you for your time. 
 agent: Thank you for reaching our service. 
 customer: Most welcome.
no_reservation

customer: Hi. 
 agent: Hello. How may I assist you today? 
 customer: I am Christine Jones. 
 agent: Nice meeting you Jones. 
 customer: Can you help me in booking from LAX to PHX? 
 agent: Sure, I will help you. Can you please provide your planned dates of travelling? 
 customer: My trip dates are 05/11 to 05/13. 
 agent: Please wait a moment to check the flights. 
 customer: Sure. 
 agent: Based on your information, I have found a flight with 1 connection with the fare of 100. Is it ok for you? 
 customer: You can book it. 
 agent: Ok, your ticket has been booked in flight number 1004. 
 customer: Thank you. 
 agent: Thank you for approaching us, have a great journey.
book