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
Input: customer: Hi. I am Jonathan Johnson. 
 agent: Please let me know, how can I support you today? 
 customer:  I want to cancel my recent  reservation due to sudden cancellation of my trip. Can you help me. 
 agent: Sure, we are happy to help to you. 
 customer: Thank you. 
 agent: Please stay online. 
 customer: Ok. 
 agent: Sorry to say that, there is no active reservation found on your name. 
 customer: That's Fine. Thank you. 
 agent: Thank you for communicating with us.
Output:
no_reservation