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 assist you at this moment? 
 customer: Myself Sandra Phillips. Can you please book a flight ticket from SFO to LGA? 
 agent: Sure, may I know your planned dates of travelling? 
 customer: Sure, I need to travel on dates of 04/05 and 04/07. 
 agent: Please wait a moment to check the flights availability. 
 customer: Sure, take your time. 
 agent: Sorry to inform you that, there are no flights moving to your region with your planned dates of travelling. 
 customer: Oh! It is sad to hear. Anyway, I will go  with another agency this time. 
 agent: Thank you for approaching us, have a great day. 
 customer: Thank you for your time. 
 agent: Welcome.
[A]: no_flight


[Q]: customer: Hi. 
 agent: Hello. How can I aid you today? 
 customer: I want to change my reservation as my previous agent did not get it right, can you please help me with it? 
 agent: Ok, sure I will help you with that. Meanwhile may I know your name? 
 customer: My name is Elizabeth Young. 
 agent: Please wait. 
 customer: Sure. 
 agent: Sorry, no reservation found on your name to change. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for reaching us.
[A]: no_reservation


[Q]: customer: Hello. 
 agent: Hello. How may I aid you? 
 customer: My name is William Lopez. Actually, I booked a ticket to NYC for a music concert but due to bad weather the trip is cancelled. 
 agent: Ok, so would you like me to change your existing reservation? 
 customer: Yes, help me out. 
 agent: Ok, please hold on for a moment. 
 customer: Sure, take your time. 
 agent: Sorry, I could not find any ticket booked with your name. 
 customer: That's ok. Thank you for your time. 
 agent: Thank you, have a great day.
[A]:
no_reservation