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
Q: customer: Hello. I am Pamela Campbell. 
 agent: Hello, how may I assist you for today? 
 customer: Can you please change my reservation as my meeting has been postponed? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: Give me a minute, I will check the previous list and let you know the details of it. 
 customer: Sure. 
 agent: Thank you for your valuable time. No reservation found on your name. 
 customer: No problem. Thank you. 
 agent: Thank you for reaching us, have a good day.
A:
no_reservation