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

Let me give you an example: 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.
The answer to this example can be: no_reservation
Here is why: 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

OK. solve this:
customer: Hello. 
 agent: Hello. 
 customer: I am Barbara Green. 
 agent: How can I assist you? 
 customer: I am very interested in Hiking and cycling. So, I am willing to visit Hiking and cycling at Bear Mountains. Can you please help me to reserve a flight ticket for me from PHX to LAX? 
 agent: Sure, may I know your preferred journey dates? 
 customer: Sure, I have planned my journey dates on 02/03 and I will catch the return flight on 02/05. 
 agent: Please give me a minute. 
 customer: Sure, take your own time. 
 agent: I found a flight for you in UA airlines with price 200. Shall I book the ticket for you? 
 customer: I am ok with the flight that you have provided to my journey. Continue with flight ticket booking. 
 agent: Your ticket is confirmed and the flight number is 1002. 
 customer: Thank you for your help in my flight ticket booking. 
 agent: Thank you for contacting us, have a safe journey. 
 customer: You are welcome.
Answer:
book