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. Is this a flight ticket booking agency? 
 agent: Please let me know, what kind of service your looking for? 
 customer: Yes, I have seen that your agency can help the customer in flight ticket booking. So, now please help me with ticket booking from DTW to MCO. Can you help me in that one? 
 agent: Sure, please share me your trip dates. 
 customer: Thank you and I have planned to travel in the month of Nov and the travel dates would be 11 and 13. 
 agent: May I know your airlines preferences? 
 customer: I am ok with any airlines. 
 agent: Please share me your connection limit. 
 customer: I am looking for a single connection flight in between my journey. 
 agent: Is there any class specifications for you? 
 customer: No, that's it. The above mentioned are my requirements, check with that one. 
 agent: We found a Delta airline and 1023 is flight number with a fare of 200. Shall I proceed? 
 customer: I am Janet Young and you can proceed with booking the ticket on my name. 
 agent: Your ticket is confirmed with an economy class. 
 customer: Thank you for your immediate response with my flight ticket reservation. 
 agent: Thank you for reaching us. 
 customer: Welcome.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I have to change my reservation due to my planned trip got postponed. So  please help me with that. 
 agent: Sure, please share your good name? 
 customer: Thank you. Please check the reservation with my name Thomas Taylor. 
 agent: Please wait for a while. 
 customer: Sure, take your time. 
 agent: Sorry, no reservation found on your given name. 
 customer: Oh! It may not be booked properly. Anyway, thank you for your time. 
 agent: Thank you for choosing us. 
 customer: Most welcome.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I serve you today? 
 customer: I want to cancel my recent reservation as my plan to meet my friend has been postponed. Can you help me with that? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: Please share me your good name please? 
 customer: I am Laura Turner. 
 agent: Please wait for a moment. 
 customer: Sure, I will wait. 
 agent: Thank you for waiting, sorry there is no reservation found on your name in our system data. 
 customer: Ok, no problem. Thank you for your information. 
 agent: Thank you for reaching us, have a nice day ahead.
Output: no_reservation