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

Example Input: customer: Hello. 
 agent: Hello,. 
 customer: I am Shirley Phillips. 
 agent: How shall I assist you? 
 customer: I want to cancel my reservation due to heavy rainfall at my place. 
 agent: I'm sorry, no reservation found by name Shirley Phillips. 
 customer: Ok, thank you for informing me. 
 agent: Thanks. Have a nice day!.
Example Output: no_reservation

Example Input: customer: Hi. 
 agent: Hello. How may I assist you? 
 customer: Emma Wilson here. 
 agent:  Emma Wilson, nice to meet you. 
 customer: I would like to book a ticket from OAK to JFK, could you please help me? 
 agent: Sure, let me know travel dates too. 
 customer: My journey dates are 12/11 and 12/13. 
 agent: I got a flight for you with 0 connection. Shall I proceed? 
 customer: Yes, proceed. 
 agent: Ok, your ticket has been booked with flight number 1016 and your airline is Spirit. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello, how can I render you today? 
 customer: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation, please help me out with that. 
 agent: Sure, I can help you with that. May I know your good name please? 
 customer: Thank you and my name is Jonathan Hall. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: There is no active reservation found under your name to do changes in that. 
 customer: It's ok, thank you for your help. 
 agent: Thank you for choosing us.
Example Output:
no_reservation