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, what can I do for you today? 
 customer: Can you please help me in flight ticket booking process from OAK to SFO? 
 agent: Sure, please forward your trip dates. 
 customer: Thank you for your response, I want to take off on Aug 27 and book my return ticket also on Aug 29. 
 agent: Is there any class preference? 
 customer: No. 
 agent: Any other requirement to be met? 
 customer: I will prefer direct flight. 
 agent: Can you please share your name to proceed further? 
 customer: Sure, my name is Steven Davis. 
 agent: Sorry, no flights found as per your requirements. 
 customer: Oh! It's ok, no problem. Thank you for your information. 
 agent: Thank you for contacting us.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello. Good Evening. 
 customer: I want to change my reservation to other locations for some personal issues. Can you please help me out? 
 agent: Sure, may I know your name? 
 customer: Myself Jonathan Evans. Can I have the information please? 
 agent: I am sorry Evans, there is no reservation found with your name to change. 
 customer: Its great, no issues. Thank you for the information. 
 agent: Your welcome.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Donna Hernandez. 
 agent: How may I assist you? 
 customer: I need a direct flight for my journey to attend an important meeting, can you please hep me in flight ticket booking from ORD to JFK? 
 agent: Sure, I will help you in flight ticket booking. 
 customer: Thank you and my travel dates are 03/07 and I will catch the return flight on 03/09. 
 agent: Ok, wait for a moment please. While I am checking for the flights available. 
 customer: Sure, I will wait for your response. 
 agent: Thanks for waiting. I have found Delta airlines which flies with one connection. 
 customer: Yes, please proceed with flight ticket booking. 
 agent: Yes, I have confirmed your flight ticket with flight number 1012. 
 customer: Thank you for your help in my flight ticket booking. 
 agent: Thank you. 
 customer: Welcome.
Output: book