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
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Question: customer: Hello,. I am Cynthia Roberts. 
 agent: Hello, how can I help you now? 
 customer: I made a earlier reservation to go for a trip with my friends, due to some financial problems, it got postponed. Can you please change my existing reservation? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: Please wait for a moment, while I check for the reservation. 
 customer: Sure. 
 agent: Thank you for waiting, sorry there is no reservation found on your name in our system data. 
 customer: Ok, no issue. Thank you for your information. 
 agent: Thank you for reaching us, we hope see you again.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello. How may I aid you today? 
 customer: My name is Robert Scott, please book me a plane ticket from BOS to OAK. 
 agent: Sure, I will help you with booking, please share your travelling dates? 
 customer: Sure, my travelling dates are from 10/23 to 10/25. 
 agent: There is a flight in UA airline with connection 1 as per your details, can I proceed to booking? 
 customer: I need 0 connected flight. 
 agent: Sorry, no flights as per your details. 
 customer: It's ok, thank you for the information. 
 agent: You are welcome. Thank you for reaching us.

Answer: no_flight


Question: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: Can you please book a ticket from DEN to MSP? 
 agent: Sure, may I know your name? 
 customer: I am Nicole Parker. 
 agent: Thank you. Could you please tell me your travel dates? 
 customer: My travelling dates are Dec 4 and Dec 6. 
 agent: Noted. Do you prefer for a connecting flight or a direct flight? 
 customer: I want single connected flight. 
 agent: Noted. May I know your departure and arrival timings? 
 customer: I am comfortable with any time. 
 agent: Noted. Do you have any class preference? 
 customer: No. 
 agent: Ok, please wait for a while. Let me check. 
 customer: Sure. 
 agent: There is a flight having single connection with AA Airlines and the ticket fare is 100 only in business class. Flight will take-off at 14:00 hours and arrives at 19:00 hours. Shall I book the ticket for you? 
 customer: Ok, please proceed. 
 agent: Your ticket is booked with the flight-1009. 
 customer: Thank you. 
 agent: You are welcome and have a nice day.

Answer:
book