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: Hello. 
 agent: Hello, how may I support you today? 
 customer: I am planning for a round trip with my friends. Can you do the reservation? 
 agent: Sure, may I know your travelling dates? 
 customer: Dates are 01/24 and 01/26. 
 agent: Help me with your airport code? 
 customer: My airport code is EWR. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Thanks for waiting, we found a connecting flight under fare of 100 in Frontier airline. Shall I proceed for booking? 
 customer: Please carry on. 
 agent: Let me know your good name please for next step? 
 customer: Ashley Thomas here. 
 agent: Your ticket has been reserved with in flight number 1028. 
 customer: Thank you so much. 
 agent: Thanks for approaching us.
A:
book