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. 
 agent: Hello. 
 customer: I am Sandra Evans. 
 agent: How can I assist you today? 
 customer: I want to change my travel dates in my previous reservation, can you please help me with that? 
 agent: Sure, please give me a moment. 
 customer: Ok. 
 agent: Thanks for waiting, there is no reservation found under your name. 
 customer: Oh! May be I am not booked my ticket properly at that time. Thank you for your service. 
 agent: Welcome, have a great day.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello. How can I serve you? 
 customer: I am Raymond Allen. I want to change an existing reservation, due to my health issues. Could you help me in changing the reservation? 
 agent: Sure, I can help you. Please wait a while. 
 customer: Sure. 
 agent: Thanks for being waiting. We didn't found any reservation by this name. 
 customer: Not an issue. Thank you. 
 agent: Thank you.

Answer: no_reservation


Question: customer: Hello, myself Kathleen Brown. 
 agent: Hello, how can I best assist you now? 
 customer: I want to book a flight ticket to visit Rocky Steps in Philadelphia, PA - PHL. Can you please make a flight reservation under the fare of 500? 
 agent: Sure, I can help you in that. 
 customer: Thank you. 
 agent: May I know your journey dates to travel? 
 customer: I want to travel on 01/31 and need to catch return flight on 02/02. 
 agent: Please share me your boarding airport code? 
 customer: My origin airport code is Orlando, FL - MCO. 
 agent: Do you need any lay by in between journey? 
 customer: Yes, I need a connecting flight. 
 agent: Thanks for your details, there is a flight available in Delta airline of flight number 1013 and fare is 200. Shall I proceed for booking with connecting flight? 
 customer: Please proceed with the booking. 
 agent: Your ticket has been reserved. 
 customer: Thanks for your assistance. 
 agent: Thanks for choosing us, wish you a good journey in Delta airlines.

Answer:
book