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: Consider Input: customer: Hello. 
 agent: Hello. How may I assist you now? 
 customer: Can you please book a ticket from OAK to DFW to attend Sports festival? 
 agent: Sure, I will help you with that. Can you please provide your preferable dates of travelling? 
 customer: My journey dates are Feb 23 and Feb 25. 
 agent: May I know your name to book a flight ticket? 
 customer: I am Rebecca Hernandez. 
 agent: Do you have any connection limit? 
 customer: Yes, I want single connection. 
 agent: Any more specifications do you have? 
 customer: No. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: As per your details, one of the flight 1006 which is providing by American airlines with a fare of 100 and there is a 1 stop, can I confirm your flight ticket booking? 
 customer: Ok, please proceed. 
 agent: Ok, your ticket has been confirmed in economy class. 
 customer: Thank you. 
 agent: Thank you for reaching us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, How can I assist you the day? 
 customer: I am planning to visit a Central Park at New York due to some issues it was postponed, so can you help me with changing my existing reservation? 
 agent:  Sure, I am here to serve you. Please mention your name to proceed to next step? 
 customer: My name is Kenneth Miller. 
 agent: Ok, please wait for a minute. I will revert to you. 
 customer: Sure, I will wait. 
 agent: Thank you for the patience. We did not find any reservation that matches with your name. 
 customer: Not an issue. Thank you for your response. 
 agent: Thank you for approaching us, regarding ticket changing procedure.

Output: no_reservation


Input: Consider Input: customer: Hi. 
 agent: Hello. How can I assist you for the day? 
 customer: Kenneth Gonzalez here. Please help me out in booking the ticket from LAS to BOS. 
 agent: Sure, I am here to help you with that. May I know your travelling dates, please? 
 customer: My trip dates will be Feb 22 to Feb 24. 
 agent: Do you have any particular time for departing and returning? 
 customer: My return time must be in the afternoon. 
 agent: May I know your connection limit? 
 customer: I want a connected flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Spirit Airlines are providing a flight-1007 with connection limit 1 and the ticket price is 100. Shall I proceed? 
 customer: Please proceed. 
 agent: Kenneth Gonzalez, your booking is confirmed successfully, the depart time is 3:00 AM and return time is 14:00 PM. 
 customer: Thank you. 
 agent: Most welcome, thank you for reaching us.
Output: book