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. 
 agent: Hello, how may I assist you today? 
 customer:  I am Jerry Brown planning a round trip to NC-CLT with my friends. Can you book a ticket? 
 agent: Sure, we can help you. May I know your connection limit please? 
 customer: I need a connection limit. 
 agent: Can you please forward your journey dates that you prefer to travel? 
 customer: My trip dates are 04/03 and 04/05. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: We found a Frontier airlines with connecting flight, flight number 1009 and the fare of 100. Shall I proceed? 
 customer: Ok, you can proceed. 
 agent: Your ticket has been reserved in economy class. 
 customer:  Thank you for booking. 
 agent: Thank you for approaching us.
Solution:
book