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. 
 agent: Hello, how may I be at your service today? 
 customer: I would like to attend for a family function in SEA. Can you please make a reservation from DCA? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: Sure, I want to depart on Apr 25 and need to return on Apr 27. 
 agent: Do you have any other specifications? 
 customer: I need a connecting flight. 
 agent: Please help me with your name for booking. 
 customer: Carol Robinson. 
 agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 with flight number 1006. Shall I proceed with this flight? 
 customer: Ok, please proceed. 
 agent: Your booking is done. 
 customer: Thank you. 
 agent: Most welcome.
Output:
book