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
Problem:customer: Hello. 
 agent: Hello, how may I address you? 
 customer: I am Janet Davis. Can you please cancel my reservation as the food festival which I have planned to attend got postponed? 
 agent: Sure, let me check the current status and revert to you. 
 customer: Ok. 
 agent: There is no reservation found in our data base by the name you mentioned above. 
 customer: It's ok, thank you for your response. 
 agent: Thank you for reaching us.
Solution:
no_reservation