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: I'm Rachel Martin here, I want to travel from NY-JFK to MA-BOS to meet my family members at Boston. 
 agent: Please provide your journey dates. 
 customer: Sure, my dates of journey is from 09/03 to 09/05. Do you have ticket for me? 
 agent: Let me check, please wait for a moment. 
 customer: Sure. 
 agent: Flight number 1003 of UA airlines is available for you. 
 customer: May I know the price and connections limit of this flight please? 
 agent: Ticket price is 100 with 1 connection. 
 customer: Ok, please book it for me. 
 agent: Your ticket is booked. 
 customer: Thank you for your help. 
 agent: Thank you for approaching us.
A:
book