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

customer: Hello. 
 agent: Hello, how can I serve you? 
 customer: I want to  cancel my recent reservation due to sudden postpone of my exams dates. 
 agent: Sure, we are here to help you. 
 customer: Can you help me with that? 
 agent: May I know your name please? 
 customer: I am Laura Wright. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Thanks for your time, there is no active reservation found in your name. 
 customer: Ok, no issues. Thank you. 
 agent: Thank you for reaching us.
no_reservation