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, how can I aid you? 
 customer: I am a magician, I have to host a show at Philadelphia. Could you book my ticket from Denver? 
 agent: Sure, may I know your trip dates? 
 customer: My itinerary dates are Nov 21 and Nov 23. 
 agent: Can you please share your region airport codes? 
 customer: My genesis and terminus airport codes are DEN and PHL. 
 agent: Do you have any connection limit preference? 
 customer: No. 
 agent: Do you have any other specifications? 
 customer: I want to depart from Denver in the afternoon. 
 agent: Could you help me with your name please? 
 customer: Anthony Perez here. 
 agent: I found a connecting flight with Southwest Airlines and the airfare is about 100. Shall I proceed with flight 1013? 
 customer: Please proceed. 
 agent: For a economy class flight your ticket is booked. 
 customer: Thank you. 
 agent: Thank you for reaching us.

Answer: book


Question: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: My holiday vacation has been postponed.Can you please help me for changing the existing reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: May I know your good name please? 
 customer: Sure, my name is Matthew Nelson. 
 agent: Sorry, there is no reservation found on your name in our database to change. 
 customer: Ok, no problem. 
 agent: Thank you for approaching us. 
 customer: Thank you for your help. 
 agent: Have a great day.

Answer: no_reservation


Question: customer: Hello,. I am Alexander Perez. 
 agent: Hello, how can I oblige you today? 
 customer: I am a volunteer at Saving Grace Orphanage, Philadelphia. Can you help me out in booking a ticket? 
 agent: Sure. Can I have your airport codes please? 
 customer: Source is from Austin, AUS. Destination is to PHL. 
 agent: Kindly mention your trip dates. 
 customer: I want to leave on 06/09 and I intend to return on 06/11. 
 agent: Do you have price limit? 
 customer: Make sure to check a flight with in a price limit of 200. 
 agent: There is a flight found with SouthWest airline, flight number 1016 with fare 200 and one lay by. Shall I confirm? 
 customer: Yes, please proceed. 
 agent: Your booking is successfully done. 
 customer: Thanks for your help. 
 agent: Thank you for reaching us.

Answer:
book