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 Samantha Baker. 
 agent: How can I assist you? 
 customer: I planned to attend for a wedding in AUS, can you please help me to book a flight ticket from ORD? 
 agent: Ok, may I know your travelling dates? 
 customer: I prefer to travel on 08/09 and 08/11. I need a direct flight. 
 agent: Sorry, no flights found on your dates. 
 customer: Ok, no problem. Thank you. 
 agent: Most welcome.
no_flight