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

Example input: 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.
Example output: no_reservation
Example explanation: 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, I am Kathleen Collins. 
 agent: Hi, Kathleen Collins. How may I helpful to you? 
 customer: I am planning to surprise my friend on his birthday.So, I want to travel from  MN- MSP on 03/23 to NY - LGA on 03/25. 
 agent: Sure, wait a minute,I will let you know. 
 customer: Sure. 
 agent: We have found a flight ticket matching your requirement. 
 customer: Ok, May I know the flight details? 
 agent: Flight number 1001 having one connection with price 200. Airline name is Frontier. Do you want me to proceed? 
 customer: OK, You can proceed with booking. 
 agent: Sure. Your reservation has been conformed. Thank you for contacting us. 
 customer: Ok, Thanks for your response. 
 agent: Have a safe journey.
A:
book