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

Example Input: customer: Hello,. 
 agent: Hello. 
 customer: I am Larry Turner. 
 agent: How may I address you today? 
 customer: As, there is a food festival is going to be held in Charlotte, CLT so, I want to my food stall in that festival. So, I need your assistance in booking my flight ticket from Boston, BOS. 
 agent: Sure, is there any connection preference? 
 customer: I am comfortable to travel in any flight. 
 agent: Can I know your preferable travelling dates? 
 customer: My schedule dates are 03/24 - 03/26. 
 agent: Please wait a moment I will check and revert to you. 
 customer: Sure. 
 agent: We found a Delta airline matching your details with the connecting flight and the price 200. 
 customer: You can proceed with my booking. 
 agent: Your booking has been confirmed. 
 customer: Thank you for kind service. 
 agent: Thanks for choosing us.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello. 
 customer: I am Gregory Carter. 
 agent: How may I help you today? 
 customer: Can you please reserve me a flight ticket which is having it's depart time in the afternoon and return in the afternoon? 
 agent: Sure, let me know your travel dates please? 
 customer: I have planned to travel on Jan 11th and return on Jan 13th. 
 agent: Could you please share me your airport codes? 
 customer: I would like to fly from EWR to MCO. 
 agent: Ok, is there any class preference? 
 customer: I prefer connecting flight. 
 agent: Do you need any airline preference? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Jet Blue airlines is providing a connecting flight with the ticket fare of 100 and depart time is 14:00 PM, arrival time is 16:00 PM. Shall I proceed? 
 customer: Ok, please book this ticket. 
 agent: Your ticket has been confirmed by flight number 1025 and an economy class. 
 customer: Thank you. 
 agent: Thanks for choosing us.
Example Output: book

Example Input: customer: Hello, I am Jerry Brown. 
 agent: Hello, how can I assist you? 
 customer: I have planned to attend a Soccer match in Orlando, FL - MCO. Can you help me for booking a ticket? 
 agent: Ok, Please provide me your travelling details? 
 customer: My source is Chicago, IL - ORD. 
 agent: May I know your travelling dates? 
 customer: My scheduled dates are from 04/03 and to 04/05. 
 agent: Is there any other specifications? 
 customer: I am looking for single connection with price 5000. 
 agent: I am sorry there are no flights as per your requirement. 
 customer: Ok, no issues. 
 agent: Thanks for choosing us, have a great day. 
 customer: Thank you for your service.
Example Output:
no_flight