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 can I aid you? 
 customer: Can you aid me to book a ticket from MSP to AUS? 
 agent: Sure, can I have your travelling dates please? 
 customer: My trip dates are June 9 and June 11 respectively. 
 agent: Please provide your specifications. 
 customer: Make sure that connection limit is single. 
 agent: May I know your good name please? 
 customer: David Carter here. 
 agent: Unfortunately there is no flight found with your given details. 
 customer: Oh! ok. 
 agent: Thank you for reaching us. 
 customer: Thank you.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you at this moment? 
 customer: I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket? 
 agent: Sure, Let me know your boarding point. 
 customer: My boarding point is SEA. 
 agent: Can you please share your depart and arrival dates? 
 customer: My travelling dates are July 07 and July 09. 
 agent: Ok, May I know your connection limit? 
 customer: I prefer single connecting flight. 
 agent: Is there any other preferences? 
 customer: No, I don't have any other preferences. 
 agent: To proceed further, may I know your name please? 
 customer: My name is Emma Perez. 
 agent: We are happy to inform you that, we found a direct flight in 1022 Spirit Airline with a fare of 200. Can I proceed for booking? 
 customer: Please proceed for booking the flight ticket. 
 agent: Sure, your ticket has been reserved. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you today? 
 customer: I am looking for a flight with a connected flight to SEA. Can you please help me for booking from PHL? 
 agent: Sure, please share me your trip dates. 
 customer: My trip dates are on Sept 02 and 04. 
 agent: For booking, we need your good name. Please mention it. 
 customer: My name is Sarah Lopez. 
 agent: Do you need direct flight or connecting flight? 
 customer: I need a connected flight. 
 agent: May I know your class preferences? 
 customer: No, I am comfortable with any class. 
 agent: Sorry to say that, there are no flights available on the routes of your journey. 
 customer: Ok, thanks for your information. 
 agent: Thank you for availing us.
Output: no_flight