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 exactly I can serve you the best today? 
 customer: I am Katherine Anderson. Can you help me booking a flight ticket from LAX to PHL? 
 agent: Can you please share your travel dates that you have planned? 
 customer: I will start on Nov, 19 and return on Nov, 21. 
 agent: Ok, Do you like to go with a connecting or direct flight? 
 customer: I need a break in my journey. 
 agent: Ok, please wait a moment. let me search a flight for you. 
 customer: Sure. 
 agent: We have found a direct flight with AA airlines, flight number 1008 and the fare of 100. Shall I reserve a ticket for this airline? 
 customer: Please proceed with the booking. 
 agent: Sure, your ticket has been reserved. 
 customer: Thank you. 
 agent: Thanks for approaching us, wish you a great journey.
book

customer: Hi. 
 agent: Hello, how can I help you today? 
 customer:  I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. can you please help me out with changing of my reservation? 
 agent: Sure, I am here to help you with that, can I know your good name to proceed further? 
 customer: Ronald Nelson here. 
 agent: Thank you. Please be online for a while. I will check your reservation status and get back to you. 
 customer: Ok. 
 agent: I am sorry to say you that there is no reservation found under your name in our database. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for reaching us.
no_reservation

customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I'm Margaret Lopez. 
 agent: Nice meeting you Lopez. 
 customer: I want to travel from NY-JFK to MI-DTW, can you please help me to book a ticket? 
 agent: Sure, let me know your travelling dates please. 
 customer: Sure, my planning is from 11/29 to 12/01. 
 agent: Sorry Lopez, there is no flight available on your provided dates. 
 customer: No problem. 
 agent: Thank you for approaching us. 
 customer: Most welcome.
no_flight