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 may I help you? 
 customer: Please book me a flight ticket from MCO to IAD to meet my family. 
 agent: May I know your trip dates to go? 
 customer: I have planned to travel on June 11th and return on June 13th. 
 agent: Do you have any connection limit? 
 customer: I prefer one connection limit. 
 agent: Is there any other specifications? 
 customer: No, thanks. 
 agent: Can I have your name? 
 customer: Myself Raymond Gonzalez. 
 agent: There is a connecting flight-1004 in economy class, is it fine for you? 
 customer: Ok, please book this ticket. 
 agent: Ok, booking is done on Delta airlines. 
 customer: Thank you. 
 agent: Thanks for choosing us.
Output:
book