Definition: 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: customer: Hi. 
 agent: Hello. 
 customer: Daniel Perez here. 
 agent: How can I help you Daniel? 
 customer: Unfortunately, I want to cancel my recently done reservation can you please help me in this? 
 agent: Sure, please wait. I will get back to you. 
 customer: Ok. 
 agent:  I have checked and seen that there is no reservation found under your name. 
 customer: That's fine. 
 agent: Thank you, have a good day. 
 customer: Thank you for your service. 
 agent: You are welcome.
Output:
no_reservation