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. 
 agent: Hello, how can I abet you? 
 customer: Being the scientist, I am going to attend the Science festivals. But due to some technical issues, I want to change my reservation. 
 agent: Ok, I will help you in that. Please provide your name to check the reservation. 
 customer: I am George Smith. 
 agent: Please wait. 
 customer: Ok. 
 agent: Thanks for your time, there is no reservation found on your name. 
 customer: No problem. Thank you. 
 agent: Thank you for reaching us.
no_reservation