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. How can I aid you? 
 customer: Can you please help me with cancelling my recent reservation? 
 agent: Sure, may I know the name to check for the status? 
 customer: My name is Jonathan Lewis. 
 agent: Please be on hold, I will get back to you in a minute. 
 customer: Ok. 
 agent: Thank you for waiting. Here, there is no active reservation has been found under your name in our database to cancel it. 
 customer: Ok, no issues. 
 agent: Thank you for reaching us. 
 customer: Thank you.
Output:
no_reservation