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. 
 customer: I am Stephanie Carter. 
 agent: What would like me to do? 
 customer: Actually, there is a small change in my trip. So, can you help me in changing my reservation? 
 agent: Yes, sure. 
 customer: Please check. 
 agent: Give me a moment to check is there any reservation under your name. 
 customer: Ok. 
 agent: Stephanie Carter there is no reservations under your name. 
 customer: That's fine for me. 
 agent: Thank you for choosing our service. 
 customer: Thank you for your quick response.
no_reservation