Given the task definition and input, reply with output. 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

customer: Hello. I am Joshua Rodriguez. 
 agent: Hello,. How can I serve you today? 
 customer: Due to some heath issues, I want to cancel my recent reservation . Will you help me in this? 
 agent: Sure, we are here to aid you. 
 customer: Thanks. 
 agent: Sorry Rodriguez, there is no active reservation found on your name. 
 customer: Ok, no issues. Thank you. 
 agent: Thank you for reaching us,.
no_reservation