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 Mary Hill. 
 agent: Please let me know, What kind of service you are looking for today? 
 customer: Can you aid me to book a flight ticket from AUS to BOS? 
 agent: Sure, I can help you to make your journey successful. 
 customer: Thank you for positive response. 
 agent: Let me know when you are willing to travel to book a flight? 
 customer: My planned trip dates are Apr 23 and Apr 25 respectively. 
 agent: Which flight you have preferred to travel either a connecting flight or a direct flight? 
 customer: I would like to travel in connecting flight for my journey. 
 agent: At the time of take off and for your return journey, do you have any specific time concern? 
 customer: My return time should be in the afternoon. 
 agent: If you can help me with your name, I can begin looking up for the availability of flights. 
 customer: Please reserve my ticket with my name which I have already mentioned above. 
 agent: Thank you for providing all necessary details, please stand by I will check and revert to you. 
 customer: Take your time. 
 agent: Thank you for waiting and we have found a flight in an business class with 1 connection in United Airlines and the fare of your flight will be 900. Do you like me to proceed your booking with this flight? 
 customer: Please proceed with these airlines. 
 agent: Your ticket has been reserved with flight number 1028. 
 customer: Thank you for your service. 
 agent: Thank you for availing us.

Answer: book


Question: customer: Hello. 
 agent: Hello, may I know your name please? 
 customer: Yes, myself Sandra Taylor. 
 agent: How can I help you? 
 customer: I want to book a flight ticket from DEN to DCA. 
 agent: May I know your travelling dates please? 
 customer: I want travel in the dates of 12/10 and 12/12. 
 agent: Sorry Sandra, there are no flights available regarding your journey. 
 customer: Ok, thank you for your information. 
 agent: Thank you and have a nice day.

Answer: no_flight


Question: customer: Hello. I am Jerry Hall. 
 agent: Hello Jerry Hall, how may I aid you? 
 customer: I planned to meet my cousin in SFO, can you please help me to book a flight ticket from SEA? 
 agent: Sure, please provide your itinerary dates. 
 customer: I prefer to travel on Jul 5 and Jul 7. 
 agent: Do you have any specifications? 
 customer: I would like to depart in evening in 1 connecting flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, no flights are available as per your specifications. 
 customer: Ok, no problem. Thank you for your time. 
 agent: Thank you for choosing us.

Answer:
no_flight