You will be given a definition of a task first, then some input of the task.
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

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.
Output:
book