Q: 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 be at your service today? 
 customer: I would like to travel from MCO to DEN as a business trip, can you do the reservation? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: My trip dates are 02/21 and 02/23. 
 agent: Do you have any other specifications? 
 customer: I need break in my journey. 
 agent: Please help me with your name for booking. 
 customer: Charles Wilson here. 
 agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1017. Shall I proceed with this flight? 
 customer: Go ahead. 
 agent: Your booking is done. 
 customer: Thank you so much. 
 agent: Most welcome.
A:
book