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 may I help you? 
 customer: Actually my Hockey competition is postponed, so that I want change my existing reservation. Can you help me? 
 agent: Sure, please let me know your name to proceed? 
 customer: Yes, I am Frank Gonzalez. 
 agent: Sorry to say, no reservation found on your name. 
 customer: Ok, not an problem. Thank you for your information. 
 agent: Thank you for reaching us, have a nice day.
A:
no_reservation