Definition: 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
Input: customer: Hi. I am Patricia Lewis. 
 agent: Hello, how can I assist you? 
 customer: Can you please assist me in booking a flight ticket to SFO from DEN? 
 agent: Sure, let me know your travelling dates. 
 customer: My travel dates are from 06/04 to 06/06. 
 agent: Please provide your specifications. 
 customer: I need a connecting flight with fare 1000. 
 agent: We found a flight with single connection and price is 100 of 1001 flight. Shall I proceed for booking? 
 customer: You can proceed. 
 agent: Your ticket has been confirmed with Spirit airlines. 
 customer: Thank you. 
 agent: Thank you.
Output:
book