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 may I support you? 
 customer: I need to amend my reservation as I have changed my schedule to some other day. Can you support me in changing my reservation? 
 agent: Sure, we are happy to help you. Can I have your good name? 
 customer: Thank you for considering my request, my name is Betty Hall. 
 agent: Sorry, we did not find any active reservation on your name in our records. 
 customer: Not a problem, anyways thank you for the information. 
 agent: Thank you for contacting us.
Student:
no_reservation