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: Hello. My name is Ryan Perez. 
 agent: Hello, how may I help you? 
 customer: I would like to travel from ORD to LAX, could you help me out? 
 agent: Sure, please share your travel dates. 
 customer: My preferable dates are from 09/14 to 09/16. 
 agent: I found a flight 1000 of AA airlines matches with your preferences, can I proceed? 
 customer: Please proceed with the booking. 
 agent: Your ticket is booked. 
 customer: Thank you, have a good day. 
 agent: Thank you for reaching us.

A: book
****
Q: customer: Hello. I am Cynthia Jackson. 
 agent: Hello, what can I serve you today? 
 customer: I want to attend an event in Washington. Can you book a flight ticket from IAD to IAH? 
 agent: Sure, please share your preferred travelling dates? 
 customer: I want to travel on 04/01 and 04/03. 
 agent: We found a Delta airline with fare of 100 matches your schedule. Shall I proceed with booking? 
 customer: Yes, proceed to booking. 
 agent: Your ticket has been confirmed with flight number 1027. Thank you reaching us. 
 customer: Thank you for your help.

A: book
****
Q: customer: Hi. 
 agent: Hello, how may I be at your service today? 
 customer:  I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me? 
 agent: May I know your name please to check the status of your reservation? 
 customer: Donna Davis here. 
 agent: Thank you. Please stay online for a while, I will check your reservation status and let you know. 
 customer: Sure. 
 agent: I have successfully cancelled your reservation and the amount will be refunded to you within 2 business days. 
 customer: Thank you so much. 
 agent: Thank you for reaching us.

A:
cancel
****