Detailed Instructions: 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
Problem:customer: Hello. 
 agent: Hello, what kind of service your looking for? 
 customer: I want to attend an interview in Houston, HOU. Can you please book a ticket from DEN? 
 agent: Sure, please share me your trip dates. 
 customer: My travelling dates are Oct 7 and Oct 9. 
 agent: For booking, we need your good name. Please mention it. 
 customer: Sure, I am Emma Scott. 
 agent: May I know your class preferences? 
 customer: I am comfortable with any class. 
 agent: Is there any time concern for you? 
 customer: My depart time is morning. 
 agent: Do you need direct flight or connecting flight? 
 customer: I am comfortable with both flights. 
 agent: We found a Delta airline and 1005 is flight number with a fare of 200. Shall I proceed? 
 customer: Yes, please proceed for booking. 
 agent: Your ticket is confirmed with an economy class. 
 customer: Thank you. 
 agent: Thank you for opting us.
Solution:
book