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, This is Stephanie White. 
 agent: Hello,. How may I help you? 
 customer: Owing to emergency, I had to request for this change reservation, so can you please help me in that? 
 agent: Ok. Sorry, no reservation found by your name. 
 customer: Ok, no problem. 
 agent: Thanks. 
 customer: Thanks for information.
A:
no_reservation