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 George Baker. 
 agent: Hello, how can I aid you? 
 customer: I would like to attend a meeting with my client at Washington, IAD. Can you please help me in booking on 12/14 and 12/16? 
 agent: Sure, may I know your source airport? 
 customer: My source point is Denver, DEN. 
 agent: Let me know your connection limit. 
 customer: I need a connected flight. 
 agent: Sorry, no flights found with your given dates. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing us.

Answer: no_flight


Question: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: My name is Linda Wilson. 
 agent: Yes, Linda. 
 customer: I want to change my existing reservation because my exam has been postponed. Can you help me out? 
 agent: Sure, I will help you in modifying the reservation. 
 customer: Thank you. 
 agent: Please wait a moment, let me check the previous reservation details on your name. 
 customer: That's ok, no problem. 
 agent: Sure. In my search to your request, no reservation found on your name. 
 customer: Ok, may be my father has cancelled my reservation. 
 agent: Ok, please check your email again to verify your reservation details. 
 customer: Ok. Thank you for checking. 
 agent: My pleasure, thank you for reaching us. 
 customer: Welcome.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello. 
 customer: Kathleen Turner here. 
 agent: How may I assist you? 
 customer: I want to attend a Marriage in Houston. Can you please help me for booking the flight ticket? 
 agent: Sure, may I know your source and destination airport codes please? 
 customer: My airport codes are DEN and HOU. 
 agent: Can I have your planned travel dates please? 
 customer: My travelling dates are 10/30 and 11/01. 
 agent: Do you have any specifications? 
 customer: I want to return on afternoon time. 
 agent: Do you need a halt in between your journey? 
 customer: I would prefer single halt. 
 agent: I found an economy class ticket in Southwest airlines with price 200 and it is a connecting flight. Can I book your ticket? 
 customer: Please proceed for booking the flight ticket. 
 agent: Ok, your booking is confirmed with flight number 1013. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.

Answer:
book