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: Hello, I am Raymond Rodriguez. 
 agent: Hello, how can I help you today? 
 customer: I would like to visit overview of city. can you please help me to book a ticket from DCA to MSP? 
 agent: Sure, when are you willing to travel? 
 customer: My travelling dates will be on 09/19 to 09/21. 
 agent: Ok, any other specifications? 
 customer: I need a connecting flight. 
 agent: Ok, flight- 1026, airline- UA, price- 100 with connection matches your requested details. 
 customer: You can proceed to booking. 
 agent: Ok, your ticket has been processed. Thank you for reaching us. 
 customer: Thank you.
Output:
book