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, how best can I guide you for the day? 
 customer: I need you to cancel my recently booked flight ticket. 
 agent: Sure, please hold a moment. 
 customer: Ok, I will. 
 agent: We need your good name to check the reservation. 
 customer: Ok, my name is Deborah Robinson. 
 agent: Thank you for sharing your good name, we found a reservation on your name and it has been cancelled. 
 customer: Great! Thanks for your help. 
 agent: Thank you.
Student:
cancel