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 assist you? 
 customer: Owing to an emergency, I am unable to attend a workshop on java technology in New York. So I had a request to you to cancel my existing reservation? 
 agent: Can I know your name please? 
 customer: Sure, I had a recent reservation with name Michelle Green. 
 agent: Please give me a moment. 
 customer: Sure. 
 agent: Thanks for waiting. Unfortunately no reservation found on your given name. 
 customer: Ok, no worries at all. 
 agent: Thank you for choosing us. 
 customer: I appreciate  your quality service.
no_reservation