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: Hello. 
 agent: Hello. How may I serve you at this moment? 
 customer: I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that. 
 agent: Sure, may I know your good name please? 
 customer: Myself Michael Lopez. 
 agent: Ok, please wait for few minutes. 
 customer: Sure. 
 agent: There is no recent reservation found on your name in our records. 
 customer: It's ok, thank you for your help. 
 agent: Thank you for reaching us.
Output:
no_reservation