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. I am Elizabeth Lee. 
 agent: Hello, how may I aid you? 
 customer: I would like to cancel my recent reservation as my workshop got cancelled. 
 agent: Sure, please wait a moment I will check and get back to you. 
 customer: OK. 
 agent: Thanks for waiting, unfortunately there is no reservation found with your name. 
 customer: Ok, thank you for your response. 
 agent: Thanks you.
Example Output: no_reservation

Example Input: customer: Hi. 
 agent: Hello, how may I render you today? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Sure, may I know your good name? 
 customer: Patrick Carter here. 
 agent: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for choosing us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: I want to cancel my recent reservation. Can you please help me in that? 
 agent: Sure, I can help you with that. May I know your good name please? 
 customer: Larry Robinson here. 
 agent: Please wait while I'll check your reservation status. 
 customer: Ok. 
 agent: Larry Robinson, there is no active reservation found under your name to do cancellation. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing us.
Example Output:
no_reservation