Instructions: 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
Input: customer: Hi. 
 agent: Hello, how can I assist you now? 
 customer: I need to change my reservation as my plan to go for an adventure trip got postponed. Can you help me? 
 agent: Sure, I will help you with that. May I know your good name? 
 customer: I am Laura Moore. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: Thank you for waiting, sorry there is no reservation found on your name in our system data. 
 customer: Ok fine, thanks for your response. 
 agent: Thank you for visiting us, have a nice day ahead.
Output:
no_reservation