Detailed 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
Q: customer: Hello. 
 agent: Hello. How can I guide you? 
 customer: Due to climate condition, I want to change my reservation. Can you do it for me? 
 agent: Sure, may I know your name please? 
 customer: My name is Scott martinez. 
 agent: Sorry Scott, there is no reservation on your name to change. 
 customer: That's fine. No issues. Thank you for your information. 
 agent: Thank you, have a nice day.
A:
no_reservation