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 be at your service today? 
 customer: Can you please help me to book a flight from AUS to CLT? 
 agent: Sure, I will help you in booking the ticket. May I know your travelling dates please? 
 customer: Sure, I want to travel on Feb 15 and need to return on Feb 17. 
 agent: Do you have any other specifications? 
 customer: I need a connecting flight. 
 agent: Please help me with your name for booking. 
 customer: Myself Donald Rodriguez. 
 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 1019. Shall I proceed with this flight? 
 customer: Ok, please proceed. 
 agent: Your booking is done. 
 customer: Thank you. 
 agent: Most welcome.

Output: book


Input: Consider Input: customer: Hi. I am Jessica Evens. 
 agent: Hello,. How may I serve you? 
 customer: I want to book a flight ticket on  01/04 to 01/06 for which I have a exam at IAH. 
 agent: Sure, may I know your origin point? 
 customer: My source code is ATL. And I want with 1 connection. 
 agent: Sorry to inform that there is no flight found with your specification. 
 customer: Ok. Thank you for  information and your service. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I am Melissa Allen. I am looking for a flight from OAK to ATL, can you reserve the flight ticket in that route? 
 agent: Sure, can you please share your trip dates? 
 customer: My trip dates are from 02/01 till 02/03. 
 agent: Here, I found a flight for you with 1 connection and fare is 100. Can I proceed? 
 customer: Please proceed with it. 
 agent: Your booking is done with flight 1004 and airline is AA. 
 customer: Thank you for your help. 
 agent: Welcome, have a nice day.
Output: book