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

[Q]: customer: Hello. 
 agent: Hello. How may I help you today? 
 customer: Can you please change my existing reservation? 
 agent: Sure, may I know your name for change in the reservation? 
 customer: Sure, I am Sharon Wright. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Thank you for waiting. Sorry, there are no active reservations on your name to change. 
 customer: Thank you for your information. 
 agent: Thank you for reaching our service.
[A]: no_reservation


[Q]: customer: Hi. 
 agent: Hello, how may I help you today? 
 customer: I want to cancel my recent reservation owing to an emergency. 
 agent: Sure, may I know your good name? 
 customer: My name is Richard Campbell. 
 agent: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: Thank you. 
 agent: Thank you for opting us.
[A]: no_reservation


[Q]: customer: Hi. 
 agent: Hello, how may I help you? 
 customer: I would like to change my recent reservation, can you help me with that? 
 agent: Sure, can I know your name? 
 customer: I am Emma Wright. 
 agent: Please hold on a moment. 
 customer: Sure. 
 agent: Sorry, there is no reservation found on given name. 
 customer: That's ok, thank you. 
 agent: Thank you for reaching us.
[A]:
no_reservation