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'm Joshua Smith. 
 agent: How can I help you Joshua Smith? 
 customer: Due to heavy tornadoes in my location, I'm unable to catch the flight. Please cancel my recent booking. 
 agent: Sure, wait a moment please. Let me check the database and get back to you. 
 customer: Sure. 
 agent: There is no active reservation found with your name in our database to cancel it. 
 customer: That's ok, thank you for your information. 
 agent: Thank you for utilising our service.
Solution:
no_reservation