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 can I assist you? 
 customer: I would like to change my reservation due bad weather condition at my destination location, can you please help me out with that? 
 agent: Sure, may I know your name? 
 customer: Myself Larry Lewis. 
 agent: Please give me a moment to check your ticket status. 
 customer: Sure, I will wait for your response. 
 agent: I found your reservation, could you provide your itinerary dates? 
 customer: Sure, my travel dates are from July 19 to July 21. 
 agent: May I know your genesis and terminus airport codes? 
 customer: My airport codes are PHL and PHX. 
 agent: Do you have any specifications? 
 customer: I would prefer connecting flight for my trip. 
 agent: Let me know if you have any preferences. 
 customer: I don't have any other specifications. 
 agent: Spirit airlines with flight 1027 is providing a connecting flight and ticket costs you 100 in economy class. 
 customer: Ok, please confirm my ticket. 
 agent: Your ticket is confirmed Larry Lewis. Flight departs at 14:00 hours and arrives at 23:00 hours. 
 customer: Thank you for booking. 
 agent: Thank you for choosing us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, How can I render you today? 
 customer: I am Benjamin Wilson. Can you please cancel my reservation as my friend's wedding has been postponed? 
 agent: Sure, we are here to aid you. 
 customer: Thank you. 
 agent: Please, wait. 
 customer: Sure. 
 agent: Thanks for your time, there is no reservation found on your name Benjamin Wilson. 
 customer: No problem. Thank you. 
 agent: Thank you for opting us.

Output: no_reservation


Input: Consider Input: customer: Hi. 
 agent: Hello. May I know your good name, Please? How can I assist you for the day? 
 customer: I am Emily perez. I want to book a flight ticket from TX-DFW to DC-DCA. 
 agent: OK. May I know your travel dates, Please? 
 customer: Sure, 01/05 and 01/07 are my journey dates. 
 agent: May I know, What is your price limit? 
 customer: 200 is my price limit. 
 agent: We are very sorry to inform you that, There are no flights available for your travel dates. 
 customer: NO issue. 
 agent: Thank you, For making an inquiry with us regarding ticket booking. 
 customer: Thank you for your response. 
 agent: Have a nice day.
Output: no_flight