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 serve you today? 
 customer: Can you please help me in flight ticket booking process from OAK to AUS? 
 agent: Sure, could you please mention with your dates of journey? 
 customer: Thank you for your response, I want to take off on Apr 16 and book my return ticket also on Apr 18. 
 agent: May I know your good name please? 
 customer: Sure, my name is Dorothy Rodriguez. 
 agent: Are you looking for any other help from my side please? 
 customer: I will prefer 1 break in between my journey. 
 agent: Please wait for a moment. 
 customer: Ok. 
 agent: There is a connecting flight of fare 100 with the Frontier airline, shall I proceed with this booking? 
 customer: Please proceed. 
 agent: Ok, I have reserved your ticket with the flight number 1000. 
 customer: Thank you for your help. 
 agent: You are welcome, have a safe journey.
Output:
book