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

Ex Input:
customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: My name is Janet Rodriguez. I have a plan to meet my friend in Seattle, can you help me for booking a flight ticket? 
 agent: Sure, I will help you in booking. Can you please help me with your travel dates? 
 customer: My travelling dates are from 03/30 till 04/01. 
 agent: Ok, may I know your airport codes? 
 customer: My travelling airport codes are from MCO to SEA. 
 agent: Here, I found a flight for you with 1 connection and fare is 100. Shall I proceed? 
 customer: Ok, please proceed for booking. 
 agent: Your booking is done with flight 1015 and airline is Spirit. 
 customer: Thank you for booking. 
 agent: Welcome, have a safe flight.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I am Melissa Garcia. I want to book a flight ticket from MCO to PHX, can you please help me in flight booking? 
 agent: Sure, May I know your journey dates? 
 customer: I want to fly on Feb 02, return on Feb 04. 
 agent: Ok, do you have any preferences? 
 customer: Yes, my return time should be afternoon. 
 agent: Ok, let me check. 
 customer: Ok. 
 agent: Sorry, we couldn't found any flights. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for connecting us.

Ex Output:
no_flight


Ex Input:
customer: Hi,. 
 agent: Hello. How can I assist you? 
 customer: I am Shirley Brown. 
 agent: Ok. 
 customer: Please book a flight to Austin, TX-AUS from Philadelphia, PA-PHL, for flower festival. 
 agent: Ok, may I know your travelling dates? 
 customer: Depart date is 07/03 and return by 07/05. 
 agent: May I know your price limit? 
 customer: Price limit is 200. 
 agent: There is a Delta 1005 airline which matches your requirememnts. Shall I proceed with that airline? 
 customer: I need a connecting flight. 
 agent: There is a connection in between the journey. 
 customer: Please book flight. 
 agent: Your booking has been confirmed on name of Shirley Brown. 
 customer: Thanks. 
 agent: Thank you for approaching us.

Ex Output:
book