You will be given a definition of a task first, then some input of the task.
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 aid you today? 
 customer: I am Sharon Adams. I need to book a flight ticket from Orlando to Oakland, so can you help m e with booking flight ticket on dates 11/18 and 11/20? 
 agent: Sure, can you please share your budget for airfare? 
 customer: Yes, I can pay up to 1000. 
 agent: Do you need any halt in between your journey? 
 customer: I need a connecting flight. 
 agent: Kindly mention your airport codes? 
 customer: Sure, my airport codes are FL-MCO and CA-OAK. 
 agent: Ok, please wait a moment. 
 customer: Ok. 
 agent: Thank you for your time, sorry, we have couple of connections on that route. Shall I proceed? 
 customer: Yes, please. No, please don't proceed. 
 agent: Ok. 
 customer: Thank you for the response. 
 agent: Thank you for approaching us.
Output:
no_reservation