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: Hi, Joshua Green here. 
 agent: Hello, how can I help you today? 
 customer: I am planning to book a flight in the afternoon time on 6th of Sept to reach Seattle, so please help me in booking a normal-cost flight. 
 agent: Sure, may I know your source and destination airport codes? 
 customer: Sure, my source and destination airport codes are DCA - SEA. 
 agent: May I know your return date? 
 customer: Sure, I intend to return on 8th of Sept. 
 agent: Do you need halt in between your journey? 
 customer: Yes, I prefer it. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Sorry, there are no flights found with your given dates. 
 customer: No worries, thank you for informing me. 
 agent: Thank you for opting us.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello, how may I help you? 
 customer: Can you please help me in booking a flight ticket from Denver, DEN to Phoenix, PHX? 
 agent: Sure, help me with the trip dates? 
 customer: My journey dates are from Aug 15 to Aug 17. 
 agent: Do you have any specifications to be met? 
 customer: No. 
 agent: May I know your name for the documentation purpose? 
 customer: My name is Kevin Harris. 
 agent: We found a flight in an airline Hawaiian with 1026 number having a single connection in an economy class. Shall I proceed to book? 
 customer: Sure, you can proceed for booking. 
 agent: Your flight ticket has been confirmed. 
 customer: Thanks for your help. 
 agent: Thank you for opting us.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: Can you aid me to book a flight ticket from AUS to LAX? 
 agent: Sure, I will help you. Please help me with your name. 
 customer: Myself Joshua Parker. 
 agent: Please help me with your planned travelling dates. 
 customer: I planned my trip on the dates Aug 6 and Aug 8. 
 agent: Do you need a break in between your journey? 
 customer: I am looking for a connecting flight. 
 agent: Do you have any other preferences in your journey? 
 customer: I prefer morning flight at the time of depart and also make sure I prefer economy class flight with normal cost airline. 
 agent: Sure, I will check with this preferences. Please allow me a minute. 
 customer: Sure. 
 agent: Joshua Parker, I am really sorry to inform you that there are no flights available for your journey. 
 customer: No issue, anyway thank you for checking. 
 agent: Thank you for reaching us. Have a great time.

Ex Output:
no_flight