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, What kind of help are you expecting from our side? 
 customer: I am Samantha Adams, want to cancel my reservation. Can you please help me? 
 agent: Sure, I can help you in that. Please stay online, I will check the previous list and revert to you. 
 customer: Sure. 
 agent: We are sorry to say that, there is no active reservation found on your name. 
 customer: It's ok, thank you. 
 agent: Thanks for approaching us, wish you a great day.
Student:
no_reservation