Detailed 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
Problem:customer: Hello, I am Richard Clark. 
 agent: Hello, how best can I serve you? 
 customer: I am going to enjoy my holiday trip in the Redwood Regional Park with my colleagues, which is at Los Angeles. Can you help me in booking a flight ticket from DCA to LAX? 
 agent: Sure, I will help you. Can you please provide your travel dates? 
 customer: I would start on 12/17 and return on 12/19. 
 agent: Do you have any specifications? 
 customer: Yes, I need a flag stop. 
 agent: We found an airline AA with flight number 1012 having a fare of 100 with halt. 
 customer: Ok, please proceed. 
 agent: Shall I proceed with booking? Ok. Your booking has been processed. 
 customer: Thanks for your support. 
 agent: Thank you for reaching us.
Solution:
book