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

Q: customer: Hello. 
 agent: Hello, what can I do for you at this time? 
 customer:  I am Kimberly Hill. I want to book a ticket to NY-LGA from TX-AUS. 
 agent: Sure, can I know your dates? 
 customer: My travelling dates are 09/23 and 09/25. 
 agent: Just hold on for a moment. 
 customer: Ok. 
 agent: Sorry for the inconvenience, there is no flight available on your dates. 
 customer: Ok, thank you for you response. 
 agent: Thank you for opting us.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello, how may I be at your service today? 
 customer: I would like to travel from MCO to DEN as a business trip, can you do the reservation? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: My trip dates are 02/21 and 02/23. 
 agent: Do you have any other specifications? 
 customer: I need break in my journey. 
 agent: Please help me with your name for booking. 
 customer: Charles Wilson here. 
 agent: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1017. Shall I proceed with this flight? 
 customer: Go ahead. 
 agent: Your booking is done. 
 customer: Thank you so much. 
 agent: Most welcome.

A: book
****
Q: customer: Hello. 
 agent: Hello. How can I help you today? 
 customer: I am Gary Hill. 
 agent: Ok. 
 customer: I need to reach Pick Place Market in Seattle on a meeting with manager. Can you please book a flight ticket from DFW to SEA? 
 agent: Sure, may I know the travelling dates of your journey? 
 customer: Sure, my travel dates are 08/07 and 08/09. Please check with connection 1. 
 agent: Please wait for  a while. 
 customer: Sure, take your time. 
 agent: Based on your requirement there is one flight matching with your request has the flight price 100 in Spirit airline. 
 customer: That's great. 
 agent: Can I proceed with this booking? 
 customer: Please confirm it. 
 agent: Your ticket has been confirmed with the flight 1014.Have a safe journey. 
 customer: Thank you for your help. 
 agent: You are welcome.

A:
book
****