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, I am Ruth Thompson. 
 agent: Hello, how can I support you today? 
 customer: I would like to attend Classical music event in Carnegie Hall at Orlando, FL-MCO, could you please help me to book a flight ticket from Las Vegas, NV-LAS? 
 agent: Sure, I am here to assist you. 
 customer: Thank you. 
 agent: Could you please help me with your travelling dates? 
 customer: I want to start on 09/15 and my return date will be on 09/17. 
 agent: May I know your price limit? 
 customer: I can pay up to 1000 for the flight ticket. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: There is a Southwest 1007 airline with fare of 100 and a halt in between the journey. 
 customer: Everything is fine, you can go ahead with the booking. 
 agent: Your booking has been confirmed on name of Ruth Thompson. 
 customer: Thank you for your assistance in booking. 
 agent: Thank you for approaching us, have a nice day.
Student:
book