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. 
 customer: Donald Scott here,. 
 agent: How may I help you? 
 customer: I want to cancel my ticket due to snow storm in my place. 
 agent: Donald Scott, I am willing to help you for this. Let me check your reservation status in our database. 
 customer: Ok. 
 agent: Donald Scott sorry to intimate, I found a reservation and cancelled sucessfully with your criteria. 
 customer: Thank you. 
 agent: You are most welcome, thank you very much for utilizing our agency.
Output:
cancel