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, Margaret Allen here. 
 agent: Hello Allen, how may I assist you? 
 customer: I want to cancel my recent reservation,  as I postponed my vacation because of bad weather. Can you please help me with this? 
 agent: Ok Allen, please hold on for a moment. 
 customer: Sure. 
 agent: I found a reservation on your name. Shall I proceed to cancel? 
 customer: Yes, please cancel. 
 agent: Your reservation has been cancelled. 
 customer: Thank you for the help. 
 agent: Thank you for reaching us. Have a good day.
Student:
cancel