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

Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: Can you assist me in booking my flight ticket from DTW to MCO? 
 agent: Sure, when are you planning to travel? 
 customer: My trip dates will be Nov 7th to Nov 9th. 
 agent: May I know your name please? 
 customer: I am Jonathan Lewis. 
 agent: Do you have any preferences? 
 customer: My depart time should be in the evening. 
 agent: Sorry, no flights found in your desired routes. 
 customer: Its ok, thank you. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello, I am Ruth Perez. 
 agent: Hello, How can I help you today? 
 customer: I love to do adventures as if now I would like to do Scuba diving in Shadow Cat Adventures at Phoenix, AZ-PHX. Can you please book a good reservation for me? 
 agent: Sure. Can you please provide your journey dates and origin code? 
 customer: I will start from New York, NY-JFK on 07/14. My returning day is on 07/16. 
 agent: Ok, please wait for a minute, I will check and get back to you. 
 customer: Ok. 
 agent: We found an Delta airline flight, with number 1004. The price is 200, with 1 connection. 
 customer: You can proceed for booking. 
 agent: Ok, your ticket has been booked with flight number 1004. 
 customer: Thanks for your service. 
 agent: Thanks for availing us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you at this moment? 
 customer: The event which I am going to attend has been cancelled, please help me in changing my existing reservation. 
 agent: Sure, I am happy to help you with that. Can I have the name on which you reserved earlier? 
 customer: My name is Edward Anderson. 
 agent: Ok, please wait a moment and I will check reservation status. 
 customer: Sure. 
 agent: Thank you for waiting. Sorry Edward, no reservation found under your name to cancel. 
 customer: Ok, no issue. Thank you for your information. 
 agent: My pleasure. Thank you for choosing us, have a great day.
Output: no_reservation