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 help you? 
 customer: For a holiday vacation I want to go to MSP on 08/09. Aid me in booking a ticket with the name of Samantha Perez. 
 agent: Sure, I am here to help you. May I know your return date? 
 customer: On 08/11, I have to return. 
 agent: Could you please share your source code? 
 customer: Phoenix, PHX is my source point. 
 agent: Do you need any halt in between your journey? 
 customer: Yes, connection is to be 1. 
 agent: Thanks for your details, there is no flight found to reach your destination. 
 customer: Fine, I will go with another flight. Thank you for your service. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: Could you please help me in flight ticket booking process from ORD to MSP? 
 agent: Sure, can you please tell me your trip dates? 
 customer: Thank you for your response, I want to take off on Nov 11 and book my return ticket also on Nov 13. 
 agent: Do you have any other requirements? 
 customer: I will prefer 1 break in between my journey. 
 agent: Ok, please wait a minute. Thank you for waiting and we have found a flight in economy class with 1 connection in Frontier airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: Please confirm this flight ticket on my name Kathleen Thomas. 
 agent: Your ticket is booked in 1001 flight. 
 customer: Thank you. 
 agent: Most welcome.

Output: book


Input: Consider Input: customer: Hi,. 
 agent: Hello, how may I assist you? 
 customer: My name is Anthony Lewis. I need a ticket from Washington DC-IAD to New York, NY-LGA, for an autoshow. 
 agent: Could you please provide me your travel dates? 
 customer: Travelling dates are from 03/20 to 03/22. 
 agent: Do you have any specifications? 
 customer: Price limit is 1000. Connections limit is 1. 
 agent: Thanks for giving your details, we found a flight on your details with airline JetBlue, flight number: 1027. 
 customer: Please book ticket. 
 agent: Your ticket has been booked. 
 customer: Thanks. 
 agent: Thanks for choosing us.
Output: book