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: Hi. I am Alexander Anderson. 
 agent: Hello, how can I aid you? 
 customer: Can you help me to cancel my reservation? Because my cricket match is cancelled in this week. 
 agent: Sure, give me a minute. 
 customer: Sure, please check my details in your records. 
 agent: Sorry, there is no reservation found under your name. 
 customer: No issues, thank you for your help in checking. 
 agent: Thank you for choosing us.
Student:
no_reservation