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, Emma Scott is my name. 
 agent: Hello, how may I support you? 
 customer: Due to sudden demise of my Great Grandmother, I want to change my existing reservation. Can you help me with this? 
 agent: Sure, please wait for a minute I will revert you with current status. 
 customer: Ok. 
 agent: Sorry to inform that there is no reservation found with your name. 
 customer: Ok, Thank you for your service. 
 agent: Thank you for availing us.
no_reservation