Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello, how can I be your helping hand today? 
 customer: Due to bad weather at my source, I want to cancel my recent reservation. Can you please help me with this? 
 agent: Sure, I can cancel your reservation right now. Before that I need to know your good name please? 
 customer: I am John Miller. 
 agent: Ok, wait for some time I will check the reservation on your name and get back to you. 
 customer: Ok. 
 agent: We are sorry to say that, there is no active reservation found on your name. 
 customer: Ok, Thank you. 
 agent: Thanks for approaching us.
Student:
no_reservation