Instructions: 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
Input: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I want to book a ticket from DCA to CLT, can you help me? 
 agent: Yes, I can help you. Could you share me your travelling dates? 
 customer: My travel dates are 06/14 and 06/16. 
 agent: Give me a moment. 
 customer: Ok. 
 agent: I have found a flight ticket with a price of 200 and 1 connection. 
 customer: Book the ticket in the name of Catherine Roberts. 
 agent: Ok, your ticket is booked. 
 customer: Thank you for booking. 
 agent: Thank you for consulting us.
Output:
book