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. 
 agent: Hello. How may I assist you today? 
 customer: Can you please book my flight ticket from EWR to MSP? 
 agent: Sure, I will help you. On which dates do you want to travel? 
 customer: My trip dates are 04/13 and 04/15. 
 agent: Could you please provide your name to book your flight ticket? 
 customer: Myself Dennis Brown. 
 agent: Ok, please hold on a moment to check the flights availability. 
 customer: Ok. 
 agent: Based on your information, flight number 1018 from Frontier airlines with 1 connection with the fare of 300 is available for you. Shall I proceed with this? 
 customer: Can you please search a flight ticket with price 200 or otherwise don't confirm this ticket. 
 agent: Sorry to inform you that, there are no flights available with in that budget. 
 customer: Ok, fine thank you for searching a flight ticket for me. 
 agent: Thank you for approaching us, have a great day.

Ex Output:
no_flight


Ex Input:
customer: Hi, I am Janet Nelson. 
 agent: Hello, how can I help you? 
 customer: I am planning for a holiday, can you help me with the booking? 
 agent: Sure, can you please provide your journey details? 
 customer: I want to fly from PA - PHL to FL - MCO. 
 agent: May I know your journey dates? 
 customer: My journey dates are 05/21 and 05/23, with the price of 500. 
 agent: Thanks for providing your details, please wait for a while. 
 customer: OK. 
 agent: Thanks for your patience, we found a flight with JetBlue airlines. Flight number is 1028 with one connection and price is 100. Shall I proceed? 
 customer: Ok, You can proceed. 
 agent: Ok, your ticket has been booked. 
 customer: Thanks for your service. 
 agent: Have a safe journey, thanks for choosing us.

Ex Output:
book


Ex Input:
customer: Hello, I am Andrew Hill. 
 agent: Hello, how can I be helping hand to you? 
 customer: I am planning to go for Music festival at MN-MSP, can you please book a ticket from AZ-PHX? 
 agent: Sure, can you please provide your scheduled dates to travel? 
 customer: My planned dates of travel are from 12/26 to 12/28. 
 agent: Ok, may I know the budget you can afford for a ticket? 
 customer: I can afford upto 500. 
 agent: Ok, please wait for a moment I will get back to you. 
 customer: Ok. 
 agent: Sorry, we have not found any flights on your preferred dates. 
 customer: Ok, no issue. Thank you for your information. 
 agent: Thank you for contacting us, have a nice day.

Ex Output:
no_flight