Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hi. 
 agent: Hello, how can I help you today? 
 customer: I am Patrick White. Please book a flight ticket on dates 12/09 and 12/11. 
 agent: Sure, kindly mention your airport codes. 
 customer: My airport codes are NY-LGA and DC-DCA. 
 agent: There is a flight with your requirement, airline is Hawaiian with price 100 and single connection. 
 customer:   Yes, please. Proceed with booking. 
 agent: Your booking is done. 
 customer: Thank you. 
 agent: Thanks for reaching us.
Student:
book