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: Hi,. 
 agent: Hello, how can I assist you today? 
 customer: I am Pamela Smith. Please cancel my recent reservation. 
 agent: Sure, wait for some time. 
 customer: Ok. 
 agent: There is no reservations found on your name. 
 customer: Thanks for the assistance. 
 agent: Thanks for choosing us.
Solution:
no_reservation