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, I'm Margaret Campbell. 
 agent: Hello, Margaret. How can I assist you today? 
 customer: Due to the bad climatic conditions in the place where I want to go, I would like to cancel my reservation. 
 agent: Sure, please allow me a moment to check the details for you. 
 customer: Ok sure. 
 agent: Your patience is greatly appreciated. Margaret, I see that there is no reservation found under your name. 
 customer: That's ok, thank you. 
 agent: You are welcome. Thank you for contacting us.
Student:
no_reservation