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 may I support you? 
 customer: Actually I have planned a trip to enjoy my weekend. But, unfortunately I have met with illness. So, I need to cancel my ticket. Can you help me with cancellation? 
 agent: Sure, I will help you. Can I have your name please? 
 customer: Donna Phillips, is my name. 
 agent: Ok, just a moment. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your good name. 
 customer:  Ok, not a problem. Thanks for your kind information. 
 agent: Thank you for selecting us.
no_reservation