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
One example is below.
Q: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
A: no_reservation
Rationale: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation
Q: customer: Hi. 
 agent: Hello. Do you need any assistance from our agency? 
 customer: Please help me out in booking the ticket from DCA to LGA. 
 agent: Sure, I will aid you with that and can I know your travel dates? 
 customer: My trip dates will be Feb 17 to Feb 19. 
 agent: May I know your name please? 
 customer: Paul Collins is my name. 
 agent: Do you have any connection limit? 
 customer: I need a connecting flight. 
 agent: Thank you for your information, there is a flight 1017 with a 1 drop off in Hawaiian airlines and the fare of the ticket is 200. Is it ok for you to book the ticket? 
 customer: Please proceed. 
 agent: Your flight ticket booking is done in an economy class flight. 
 customer: Thank you. 
 agent: Most welcome and have a happy journey.
A:
book