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

Q: customer: Hi. 
 agent: Hello. 
 customer: My name is Eric Wilson. 
 agent: Eric, how can I help you? 
 customer: Due to heavy rains in my existing location, I want to cancel my reservation. Could you help me in cancellation of ticket? 
 agent: Sure, I will help you. Please wait for a while, I will check your reservation status and get back to you. 
 customer: Ok, take your time. 
 agent: Wilson, I did not find any reservation by your name in our database. 
 customer: That's fine, no problem. Thank you for helping me. 
 agent: You are welcome and thank you for choosing us.

A: no_reservation
****
Q: customer: Hi. 
 agent: Hello, how may I guide you? 
 customer: I am Patricia Brown here, I want to reserve my ticket from LAS to ATL, can you please help me? 
 agent: Sure, can I know your preferable dates? 
 customer: Sure, my planned dates of journey are from 11/26 to 11/28. 
 agent: I found a direct flight 1002 of Frontier airlines matches with your preferences, can I proceed? 
 customer: Ok, you can book it. 
 agent: Your ticket is booked. 
 customer: Thank you for your help in booking my ticket. 
 agent: Thank you, have a good day.

A: book
****
Q: customer: Hello. I am Christine Brown. 
 agent: Hello. How can I help you? 
 customer: I want to attend my friend's wedding in New York.Can you help me to book a flight ticket from PHX to LGA? 
 agent: Sure, please tell your travelling dates? 
 customer: I want to depart on 01/12 and return by 01/14. 
 agent: Delta airlines is available with 1 connection and ticket price is just 200. Shall I proceed with it? 
 customer: Please book this ticket for me. 
 agent: Your reservation is confirmed with flight 1004. 
 customer: Thank you for helping me out. 
 agent: Thank you and have a nice day.

A:
book
****