Detailed Instructions: 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
Problem:customer: Hi. 
 agent: Hello. 
 customer: I am Samuel Lopez. 
 agent: How may I guide you? 
 customer: Can you help me in cancelling my recent reservation? 
 agent: Sure, please wait a minute. 
 customer: Sure. 
 agent: Sorry Samuel, there is no active reservation found under your name. 
 customer: Ok, Not an issue. Thank you. 
 agent: Most welcome.
Solution:
no_reservation