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: Hi. I am Nicholas White. 
 agent: Hello. How can I assist you for the day? 
 customer: I need to cancel my reservation as I fallen sick last night and cant travel. Can you help me? 
 agent: Sure, I am here to help you with this. 
 customer: Thank you. 
 agent: There is no reservation found with your name in our database to cancel it. 
 customer: That's Ok, thanks for your response. 
 agent: Thank you for contacting us, have a nice day.
no_reservation