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: Hi. 
 agent: Hello. 
 customer: I am Angela Jackson. 
 agent: How may I guide you today? 
 customer: Can you please help me with booking a flight ticket from HOU to LAX? 
 agent: Can you please share your preferable journey dates? 
 customer: Journey dates are 10/31 and 11/02. 
 agent: Is there any class preference? 
 customer: No. 
 agent: Is there any connection limit? 
 customer: I need a connecting light. 
 agent: Do you have any specifications? 
 customer: I would like to depart at afternoon. 
 agent: I found a ticket for you with price of 200, flight number is 1027 in economy class and  connection is 1. Is it ok for you? 
 customer: You can proceed with booking. 
 agent: I confirmed your ticket successfully. 
 customer: Thanks for the help. 
 agent: Thank you for reaching us.
Output:
book