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. How can I assist you? 
 customer: I'm Daniel White. I am planning to attend convocation meeting at DEN, can you please help me with booking a flight ticket from SFO? 
 agent: Sure, can I know you travel dates? 
 customer: Sure, I would like to take off on 05/11 and return back on 05/13. 
 agent: Please give me a minute. 
 customer: Ok, but please make sure that the connection limit is 0. 
 agent: Daniel, there is no flight available on your requested dates. 
 customer: Ok, no issues. Thank you for the information. 
 agent: You are welcome.
no_flight