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: Hi. 
 agent: Hello, what kind of service are you seeking from us? 
 customer: Can you please help me with changing my recent reservation? 
 agent: Sure, may I know your name to check the reservation status? 
 customer: My name is Amanda Davis. 
 agent: Ok, please wait for a minute. 
 customer: Ok. 
 agent: Sorry, there is no reservation found on your name to change. 
 customer: That's ok, thanks for the help. 
 agent: Thank you for choosing us.
A:
no_reservation