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. How can I assist you? 
 customer: Can you please book a flight ticket for me from OAK to AUS? 
 agent: Ok, please can I know your name to proceed with your concern? 
 customer: I am Brandon Scott. 
 agent: Please mention your departure date and return dates. 
 customer: My trip is in Feb from 4th to 6th. 
 agent: Ok, please can I know your airlines preferences? 
 customer: I am comfortable with any airline. 
 agent: Can you let me know your planned connection limits? 
 customer: Sure, I prefer to travel in a single connecting flight. 
 agent: Ok, do you have any specifications regarding the travel timings? 
 customer: No, I can travel at any time. 
 agent: Ok, please let me know your specifications regarding the flight class. 
 customer: I would like to travel in economy class. 
 agent: Ok Mr. Brandon Scott, there is a flight ticket available with 1 connection limit and the airfare is 100. Can I book a flight provided by United Airlines? 
 customer: Yes, please proceed. 
 agent: Ok, the flight 1016 is confirmed and the class is economy. 
 customer: Thank you for your help. 
 agent: Thank you for choosing our agency, have a safe journey.
A:
book