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 can I aid you today? 
 customer: Can you aid me in booking a flight ticket from ORD to LGA? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: May I know your travel dates please? 
 customer: I am planning to start on Sep 24th and return back on Sep 26th. 
 agent: Ok, do you have any specifications? 
 customer: Make sure that connection limit is 1. 
 agent: Ok, hold on for a moment. Let me check the best available flight for you. 
 customer: Take your time. 
 agent: I found a flight for you with Frontier Airlines and it costs you 300. Shall I proceed? 
 customer: Book it on the name Dennis Allen. 
 agent: Your ticket has been booked with 1013 flight number. 
 customer: Thank you for the support. 
 agent: Welcome, thank you for choosing us. Have a great day.
Output:
book