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. 
 customer: I am Ashley smith. 
 agent: How can I help you from flight booking agency? 
 customer: I am planning to go for bussiness trip to Minneapolis. Can you please book me a flight ticket? 
 agent: Sure, can you please share your travelling airport codes? 
 customer: My travelling departure and arrival airport codes from SEA to MSP. 
 agent: May I know your preferable journey dates to proceed further? 
 customer: My travellling dates are 03/19 and 03/21. 
 agent: Wait a moment please, let me check the flights availability on this route. 
 customer: Ok. 
 agent: AA airlines is providing the service on this route with 1 connection limit, shall I book your ticket? 
 customer: Sure, you can book the ticket for this flight. 
 agent: Ashley smith, your ticket is confirmed successfully with flight number 1018. 
 customer: Thank you for your valuable services. 
 agent: Thank you for choosing our services, have a safe journey. 
 customer: Most welcome.

Output: book


Input: Consider Input: customer: Hello, I am George Baker. 
 agent: Hello, how can I aid you? 
 customer: I would like to attend a meeting with my client at Washington, IAD. Can you please help me in booking on 12/14 and 12/16? 
 agent: Sure, may I know your source airport? 
 customer: My source point is Denver, DEN. 
 agent: Let me know your connection limit. 
 customer: I need a connected flight. 
 agent: Sorry, no flights found with your given dates. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing us.

Output: no_flight


Input: Consider Input: customer: Hi, I am Jack Lewis. 
 agent: Hello, how may I aid you? 
 customer: Owing an emergence, I want to cancel my recent reservation. 
 agent: Sure, I will help you. 
 customer: Can you please help me with it? 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Thanks for your time. There is no active reservation found in your name to cancel. 
 customer: No problem, thanks for the information. 
 agent: Thank you for availing us.
Output: no_reservation