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: Hi. Amy Jones here. 
 agent: Hello, how can I support you? 
 customer: Can you book a flight ticket for my airport codes that is from SFO to PHX? 
 agent: May I know your trip dates? 
 customer: The trip dates are from 18 June to 20 June. 
 agent: Do you need any break in my journey? 
 customer: Yes. 
 agent: Is there any class preference? 
 customer: No. 
 agent: Do you have any other requirements? 
 customer: No, that is it. 
 agent: May I know your name please? 
 customer: I am Amy Jones. 
 agent: There is a connecting flight with fare of 100 and 1020 flight number. Shall I proceed? 
 customer: You can book the flight ticket. 
 agent: Your seat has been reserved with Frontier airlines in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing our services.

Answer: book


Question: customer: Hello, I am Dennis Mitchell. 
 agent: Hello,Mitchell. How shall I guide you? 
 customer: My business meeting has been postponed, so I want to change my existing reservation. Can you guide me for changing an reservation? 
 agent: Definitely,let me check. 
 customer: Sure. 
 agent: Sorry,no reservation has found on your name. 
 customer: Ok, no problem. Thanks for your service. 
 agent: Thank you for approaching us.

Answer: no_reservation


Question: customer: Hello, I am Samantha Hill. 
 agent: Hello, how may I assist you for today? 
 customer: Due to my health issue I want to cancel my recent reservation, so can you please assist me with this? 
 agent: Sure, please wait a moment I will check your reservation details and get back to you. 
 customer: Sure. 
 agent: Sorry, I regret to say that there is no reservation found under your name. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us, have a nice day.

Answer:
no_reservation