Q: 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
customer: Hello. 
 agent: Hello. How can I assist you at this moment? 
 customer: Owing an emergency, I want to cancel my reservation. Can you help em for that? 
 agent: Sure, I will assist you with that. May I know your name for further process? 
 customer: My name is Jeffrey Campbell. 
 agent: Ok, please hold on a moment. 
 customer: Sure, I will wait for your response. 
 agent: I have found your reservation and cancelled successfully. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.
A:
cancel