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, I am Jerry Robinson. 
 agent: Hello Jerry. How can I assist you? 
 customer: I would like to cancel my recent reservation due to postpone of my conference at Denver. Could you please help me with the cancellation? 
 agent: Sure, please give me a minute. 
 customer: Sur. 
 agent: Jerry, there is no reservation available on your name. 
 customer: That's fine, thank you for the information. 
 agent: You are welcome.

A: no_reservation
****
Q: customer: Hello. 
 agent: Hello. 
 customer: I am Angela Baker. 
 agent: How may I aid you today? 
 customer: Can you find a flight from HOU to SEA, to visit the Chihuly Garden and Glass. 
 agent: Sure, I am here to help you out. Please provide me your trip dates. 
 customer: Help me with booking ticket from 08/20 and 08/22. 
 agent: Sure  Angela Baker, there is a flight with 1 stop and price is 100 in economy class, can I proceed with it? 
 customer: Yes, please. 
 agent: Your ticket has need with 1014 flight in Delta airlines. 
 customer: Thanks for your help. 
 agent: Thank you for reaching us.

A: book
****
Q: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: Can you help me to book a flight ticket from HOU to LAX? 
 agent: Sure, I am perky to help you. Please help me with your travelling dates. 
 customer: My travel dates are June 30 and July 02. 
 agent: Do you have any break in between journey? 
 customer: Yes, I need a break in between my journey. 
 agent: Is there any other specifications for you? 
 customer: I would like to prefer business class. 
 agent: Can I have your good name? 
 customer: I am Andrew Campbell. 
 agent: Sorry, no flights are available on your journey routes. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us.

A:
no_flight
****