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. 
 customer: I am Gary Smith. 
 agent: Gary, how may I aid you? 
 customer: I want to book a ticket from EWR to MCO to attend seminar, can you help me in booking? 
 agent: Sure, please provide your trip dates. 
 customer: I am departing on 09/19 and return on 09/21. 
 agent: Please hold on for a while. 
 customer: Sure. 
 agent: Southwest airlines with flight 1016 is providing service with a connecting flight. 
 customer: Please proceed for booking. 
 agent: Your ticket is reserved. 
 customer: Thank you for your help. 
 agent: Thank you for choosing us.
Output:
book