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

Input: Consider Input: customer: Hello. 
 agent: Hello, how may I assist you at this moment? 
 customer: I need to cancel my reservation as I need to stay back in own city, due to my house has collapsed by Floods. 
 agent: May I know your name to track your details? 
 customer: Sure, I am Patricia Roberts. 
 agent: Ok, please give me a minute. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your name. 
 customer: Ok, Thank you for your service. 
 agent: Thank you for consulting us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I aid you today? 
 customer: My name is Robert Scott, please book me a plane ticket from BOS to OAK. 
 agent: Sure, I will help you with booking, please share your travelling dates? 
 customer: Sure, my travelling dates are from 10/23 to 10/25. 
 agent: There is a flight in UA airline with connection 1 as per your details, can I proceed to booking? 
 customer: I need 0 connected flight. 
 agent: Sorry, no flights as per your details. 
 customer: It's ok, thank you for the information. 
 agent: You are welcome. Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Edward Anderson. 
 agent: How can I assist you today? 
 customer: I want to book a flight ticket from Los Angeles to San Francisco to meet my grand mother. 
 agent: Sure, can you please share your travel dates? 
 customer: Sure, I intend to depart on Nov 10 and arrive on Nov 12. 
 agent: Could you please help me with airport codes? 
 customer: Sure,  my airport codes are LAX and SFO. 
 agent: Do you have any class preferences? 
 customer: Yes, I need a halt in between the journey. 
 agent: Edward Anderson, there is a flight available with price 100 and the connection is 1 with UA airline. Would you like me to proceed with the booking? 
 customer: You can proceed with booking. 
 agent: Your booking is confirmed with 1019 flight number. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.
Output: book