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. 
 agent: Hello. How can I help you today? 
 customer:  I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me? 
 agent: Sure, I am here to help you with that, can I know your good name to proceed further? 
 customer: Amy Martinez here. 
 agent:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: No issue, thanks for the information. 
 agent: Thank you for reaching us.
Student:
no_reservation